BULLETIN NUMBER 17
TABLE OF CONTENTS
PAGE
SUMMARY OF SOUTHEASTERN U. S. EARTHQUAKES: JULY THROUGH DECEMBER 1985.... 1
Acknowledgments........................................................ 2
References............................................................. 2
SEUSSN EARTHQUAKE STATISTICS............................................. 10
LISTING OF HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
SOUTHEASTERN U.S. EARTHQUAKES: JULY THROUGH DECEMBER 1985............. 13
LISTING OF HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
RESERVOIR ACTIVITY (M ge 1.0): JULY THROUGH DECEMBER 1985............ 39
ADDITIONAL ARRIVAL TIME DATA: JUNE THROUGH DECEMBER 1985................ 41
DESCRIPTION OF APPENDICES................................................ 43
Appendix A. Definitions and Operator Listing.......................... 45
Appendix B. Seismic Stations Operating During Report Period........... 47
Appendix C. Errata and Addenda........................................ 59
Appendix D. Calibration of the Virginia Tech Digital Seismic Network.. 61
Appendix E. Study of Traveltime Residuals at the Stations of the
Virginia Tech Network..................................... 69
MAILING LIST............................................................. 75
LIST OF FIGURES
1. Earthquake Epicenter Map for the Report Period...................... 3
2. Earthquake Epicenter Map for the Report Period (Scaled to Magnitude) 5
3. Earthquake Epicenter Map for the Period from July 1977 through
December 1985..................................................... 7
4. Earthquake Epicenter Map for the Period from July 1977 through
December 1985 (Scaled to Magnitude, M ge 3.0)..................... 9
5. Focal Depth Distribution of Southeastern U.S. Earthquakes........... 11
6. Seismic Stations Operating During Report Period..................... 51
7. Georgia Tech - Geological Survey Of Alabama Seismic Network......... 53
8. South Carolina Seismic Network...................................... 53
9. Tennessee Earthquake Information Center - Southern
Appalachian Regional Seismic Network.............................. 55
10. Tennessee Valley Authority Seismic Network.......................... 55
11. Virginia Tech Seismic Network....................................... 57
12. Relative Velocity Response of Station BLA........................... 63
13. Displacement Amplitude Response of Station BLA...................... 65
14. Displacement Phase Response of Station BLA.......................... 67
15. NAV P-Wave Residuals................................................ 71
16. GHV S-Wave Residuals................................................ 73
SUMMARY OF SOUTHEASTERN U. S. EARTHQUAKES:
JULY THROUGH DECEMBER 1985
There were 27 earthquakes (0.0 le M le 3.3) located within the SEUSSN
monitoring area during the last six months of 1985. Of those, two in Delaware
(10 and 20 October, MDB = 1.9 and 1.7, respectively), two in Tennessee (12
July, MDB = 3.0; 22 December, MDB = 3.3), and one in Virginia (21 December,
mb(Lg) = 2.6) were felt. Southeastern Tennessee continues to have the highest
level of seismic activity within the region (19 earthquakes). Earthquakes
reported include two in Delaware, one in Georgia, one in South Carolina, 20 in
Tennessee and three in Virginia. Figures 1 and 2 are epicenter maps of
tectonic events (M ge 0) located within the region during the report period.
Figures 3 and 4 are cumulative epicenter maps for the 8.5 year period from July
1977 through December 1985 (SEUSSN Bulletins 1 through 17). Report period and
cumulative earthquake catalog statistics are presented on page 10. Figure 5 is
a plot of focal depth distributions for both the report period and for the
cumulative earthquake catalog.
The largest earthquake for the report period was a MDB = 3.3 event (22
December) that was felt in Gatlinburg, Tennessee. At least five aftershocks to
this event were detected. Also of some interest is a MDB = 3.0 earthquake (12
July) that was felt at Hixon, Tennessee, and the Sequoyah Nuclear Plant.
Susan Rhea of the U.S. Geological Survey has informed the editors that for
the South Carolina Seismic Network, they use a duration magnitude of the form:
MDL = -0.87 + 2.0 log (D) + 0.0035 X
where D is the signal duration from onset of the P arrival to the time at which
the signal is twice the background level, and X is the epicentral distance in
kilometers. This is the same formula listed in Lee and Stewart (1981, page
156) where MDL is an estimate of Richter's ML magnitude.
Jill Rawlins of the USC has informed the editors that they use a coda
length/duration magnitude based on ML.
The Tennessee Earthquake Information Center, Georgia Institute of
Technology, and the Virginia Tech Seismological Observatory use a duration
magnitude of the form:
MDB = -3.45 + 2.85 log (D)
where D is signal duration measured from the P-wave arrival time to the time
when the signal returns to background. This magnitude should be roughly
equivalent to mb(Lg) for earthquakes of magnitude less than 5 (or of signal
duration less than about 1000 sec).
Ken Woodruff of the Delaware Geological Survey reports that they also use
a duration magnitude that roughly approximates mb where duration is measured
from the onset of the P-wave to the point where the signal returns to
background level.
Acknowledgments
This report is the seventeenth semiannual BULLETIN OF SEISMICITY OF THE
SOUTHEASTERN UNITED STATES and covers the period from July through December,
1985. The organizations supplying data for this Bulletin are the Delaware
Geological Survey, the E. I. DuPont de Nemours and Company, Inc. (Savannah
River Laboratory), Georgia Institute of Technology, Memphis State University
(Tennessee Earthquake Information Center), the Tennessee Valley Authority, the
University of South Carolina, the United States Geological Survey, the Virginia
Division of Mineral Resources, and Virginia Polytechnic Institute and State
University (Seismological Observatory).
In addition to the support furnished by the host institutions of the
network contributors, partial or full support by other agencies for the
operation of portions of the SEUSSN is gratefully acknowledged. The agencies
providing support to the members of SEUSSN are as follows:
The Georgia Power Company,
The National Science Foundation,
The Nuclear Regulatory Commission,
The Tennessee Valley Authority,
The United States Geological Survey,
The Virginia Power Company.
References
Evernden, J. F., (1967), MAGNITUDE DETERMINATION AT REGIONAL AND NEAR-REGIONAL
DISTANCES IN THE UNITED STATES, Bulletin of the Seismological Society of
America, 57, pp. 591-639.
Lahr, J. C., (1980), HYPOELLIPSE/MULTICS: A COMPUTER PROGRAM FOR DETERMINING
LOCAL EARTHQUAKE HYPOCENTRAL PARAMETERS, MAGNITUDE, AND FIRST-MOTION
PATTERN, U.S. Geological Survey Open-File Report 80-59, 59 pp.
Hoaglin, David C., Frederick Mosteller, and John W. Tukey, (1983),
UNDERSTANDING ROBUST AND EXPLORATORY DATA ANALYSIS, John Wiley & Sons, New
York, NY, 447 pp.
Lee, W. H. K., and J. C. Lahr, (1974), HYPO71: A COMPUTER PROGRAM FOR
DETERMINING HYPOCENTER, MAGNITUDE, AND FIRST MOTION PATTERN OF LOCAL
EARTHQUAKES, United States Geological Survey Open-File Report 75-311,
Revised: January 1974, 134 pp.
Lee, W. H. K., and S. W. Stewart, (1981), PRINCIPLES AND APPLICATIONS OF
MICROEARTHQUAKE NETWORKS, Academic Press, New York, NY, 293 pp.
Nuttli, O. W., (1973), SEISMIC WAVE ATTENUATION AND MAGNITUDE RELATIONS FOR
EASTERN NORTH AMERICA, Journal of Geophysical Research, 78, pp. 876-885.
Ott, L., (1984), AN INTRODUCTION TO STATISTICAL METHODS AND DATA ANALYSIS,
Second Edition, Duxbury Press, Boston, MA, 775 pp.
FIGURE 1. Epicenters (Open Circles) for Earthquakes (M ge 0.0) in the
Southeastern United States from July through December 1985.
FIGURE 2. Epicenters (Open Circles - Scaled to Event Magnitude) for
Earthquakes (M ge 0.0) in the Southeastern United States from July
through December 1985.
FIGURE 3. Epicenters (Open Circles) for Earthquakes (M ge 0.0) in the
Southeastern United States from July 1977 through December 1985.
FIGURE 4. Epicenters (Open Circles - Scaled to Event Magnitude) for
Earthquakes (M ge 3.0) in the Southeastern United States from July
1977 through December 1985.
SEUSSN EARTHQUAKE STATISTICS
Period: July through December 1985 (0.5 years)
Tectonic Reservoir
Number of Earthquakes with M ge 0.0 27 5
Number of Earthquakes with M ge 2.5 4 0
Number of Earthquakes with M ge 3.5 0 0
Mean Earthquake Magnitude 1.6 1.4
Median Earthquake Magnitude 1.6 1.2
Number of Felt Earthquakes 5 0
Number of Earthquakes with Known Dmin le 25.0 km 21 4
Number of Earthquakes with Known ERH le 5.0 km 25 4
Number of Earthquakes with Known ERZ le 5.0 km 21 5
Largest Earthquake Reported 22 December 1985; 00:56 - Wear Cove, TN
MDB = 3.3, felt in Gatlinburg, TN
Number of Blasts or Non-locatable Events Reported 4
Number of Events Outside the SEUSSN Reported 0
Number of Seismograph Stations Operating 147
Period: July 1977 through December 1985 (8.5 years)
Tectonic Reservoir
Number of Earthquakes with M ge 0.0 474 577
Number of Earthquakes with M ge 2.5 109 47
Number of Earthquakes with M ge 3.5 12 1
Mean Earthquake Magnitude 1.8 1.4
Median Earthquake Magnitude 1.8 1.3
Number of Felt Earthquakes 69 3
Number of Earthquakes with Known Dmin le 25.0 km 227 50
Number of Earthquakes with Known ERH le 5.0 km 373 78
Number of Earthquakes with Known ERZ le 5.0 km 313 72
Largest Earthquake Reported July 20, 1980; 18:52 - Sharpsburg, KY
mb(Lg) = 5.2, MMI = VII
Number of Blasts or Non-locatable Events Reported 159
Number of Events Outside the SEUSSN area Reported 9
FIGURE 5. Focal Depth Distribution of Southeastern U.S. Earthquakes. The
upper half of the figure shows the interval (1 km) depth
distribution for the report period while the lower half of the
figure displays the interval depth distribution for earthquakes
reported during the period from July 1977 through December 1985 (M
ge 0.0 and ERZ le 5.0 km). Displayed above both distributions is a
statistical box plot (Ott, 1984, pp. 43-47; Hoaglin and others,
1983, pp. 58-65). Indicated are the mean (star), the 25% and 75%
quartile (box outline), the median (center bar), and the upper and
lower adjacent values (X's). Shown to either side of the box plot
are mild (open symbols) and extreme (solid symbols) outliers. NPTS
is the number of depths used, MEAN is the average depth, MED is the
median depth, SSD is the sample standard deviation, IQR is the inner
quartile range, and NOUT is the number of outliers present in the
data.
LISTING OF HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
SOUTHEASTERN U. S. EARTHQUAKES: JULY THROUGH DECEMBER 1985
Events are listed chronologically (this also applies to multiple
hypocenter locations for the same event). All times are Universal Time. Most
entries in the listing are self-explanatory. Items that might require further
explanation are defined in Appendix A.
***** 2 JULY 1985; 05:38 - BLACKSBURG, VIRGINIA *****
*VTSO This event is a probable aftershock to the Blacksburg, Virginia,
earthquake of 10 June 1985; 12:22 (see SEUSSN Bulletin 16, page 34)
*VTSO OT= 05:38:24.9 LAT= 37.245N LON= 80.567W DEP= 7.7 KM MDB= -0.6
NO= 6, GAP= 185 DEG, RMS RES= 0.1 SEC, Q= C, SQD= B/D
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 0.8 KM, AZ= 2 DEG; ERHMIN= 0.4 KM; ERZ= 2.2 KM; Q= B)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BLA 13.6 106 iPu 05:38:27.75 ( 0.0 ) S 05:38:29.52 ( 0.0 )
NAV 21.6 291 P- :28.85 (-0.1 ) S :31.70 ( 0.1 )
VWV 29.0 32 eP :30.25 ( 0.1 ) S :33.65 ( 0.0 )
***** 12 JULY 1985; 18:20 - CHICKAMAUGA LAKE, TENNESSEE *****
*TEIC Felt at the Sequoyah Nuclear Plant, Tennessee
*NEIC Felt at Hixson and at the Sequoyah Nuclear Plant, Tennessee
*GIT OT= 18:20:28.3 LAT= 35.202N LON= 85.148W DEP= 19.6 KM MDB= 3.0
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.6 KM, AZ= -63 DEG; ERHMIN= 0.3 KM; ELLIPSE AREA= 0.6 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCG 31.1 216 P 18:20:33.95 (-0.4 ) S 18:20:37.85 (-0.8 )
RCT 47.0 70 P :36.65 ( 0.1 ) S :42.35 (-0.3 )
CPO 58.9 319 P :38.93 ( 0.5 )
ETT 64.5 78 P :39.10 (-0.2 )
DCT 68.5 104 P :40.20 ( 0.3 ) S :48.90 ( 0.6 )
HGA 122.6 212 P :48.70 ( 0.4 ) S :21:03.75 ( 0.8 )
OCA 134.8 241 P :50.10 (-0.1 ) S :06.50 ( 0.2 )
-----
*TEIC OT= 18:20:28.4 LAT= 35.198N LON= 85.156W DEP= 3.1 KM MDB= 3.0
NO= 26, GAP= 104 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 1.0 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCG 30.3 215 iP 18:20:34.66 ( 1.0X)
RCT 47.9 70 iP :36.65 (-0.1 ) iS 18:20:43.10 ( 0.2 )
CPO 57.9 319 iPc :38.30 (-0.1 )
ETT 65.3 77 iPd :39.69 ( 0.1 ) iS :47.75 (-0.1 )
DCT 69.1 103 iP :40.20 ( 0.0 ) iS :48.90 ( 0.0 )
BHT 74.5 15 P :41.34 ( 0.3 )
SWTN 84.5 278 ePc :42.90 ( 0.1 )
LCAL 86.6 210 ePd :43.10 ( 0.0 ) iS :53.90 ( 0.0 )
GBTN 100.4 59 eP :45.25 (-0.2 ) eS :57.77 (-0.1 )
ORT 110.4 44 eP :47.00 (-0.1 )
HGA 121.8 211 eP :48.70 (-0.1 ) eS :21:03.75 ( 0.0 )
BBG 128.0 106 eP :49.62 ( 0.1 ) eS :09.00 ( 3.9X)
OCA 133.6 241 eP :50.10 (-0.5X) eS :06.50 (-0.4X)
TKL 135.5 68 ePc :50.72 (-0.2 ) iS :07.63 ( 0.3 )
MSAL 143.9 254 iPd :51.80 (-0.4 )
COTN 177.0 292 eP :57.40 ( 0.1 )
RBNC 198.2 85 eP :21:00.61 ( 0.4 ) S :27.82 ( 4.3X)
RICH 226.4 69 eP :05.37 ( 0.7X) eS :31.14 (-0.1 )
TRYN 265.2 88 eP :10.48 ( 0.2 ) iS :41.90 ( 1.0X)
PWLA 266.2 265 iP :10.39 (-0.2 ) iS :42.02 ( 0.6X)
BRBC 267.2 77 eP :11.22 ( 0.8X) iS :40.74 (-0.3 )
PLVA 395.8 66 eP :21.16 (-5.1X) eS :22:07.60 (-0.9X)
-----
*NEIC OT= 18:20:28.7 LAT= 35.192N LON= 85.145W DEP= 10.0 KM MD= 3.0
NO= 13
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RSCP 60.0 319 eP 18:20:38.80 (-0.9 )
SWTN 85.6 278 eP :42.96 (-0.8 ) iS 18:20:53.19 ( X)
LCAL 86.7 211 eP :43.12 (-0.8 ) iS :53.97 ( X)
ANTN 109.0 356 eP :46.35 (-1.0 )
ORT 110.1 43 eP :47.00 (-0.5 )
ABTN 116.8 312 eP :47.71 (-0.8 )
TKL 134.6 67 eP :50.80 (-0.5 )
HPKT 141.2 54 eP :51.70 (-0.5 )
MSAL 144.6 255 iPd :51.77 (-1.0 ) iS :21:09.86 ( X)
ONTN 156.8 24 eP :53.66 (-0.8 )
PWLA 266.9 266 eP :21:10.40 ( 1.7 )
PRM 283.6 115 eP :11.50 ( 0.8 )
GFM 319.1 70 eP :18.50 ( 3.0 )
***** 4 AUGUST 1985; 00:19 - BLACKSBURG, VIRGINIA *****
*VTSO This event is a probable aftershock to the Blacksburg, Virginia,
earthquake of 10 June 1985; 12:22 (see SEUSSN Bulletin 16, page 34)
*VTSO OT= 00:19:32.8 LAT= 37.245N LON= 80.512W DEP= 11.1 KM MDB= -0.4
NO= 8, GAP= 113 DEG, RMS RES= 0.2 SEC, Q= C, SQD= C/B
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 1.4 KM, AZ= -22 DEG; ERHMIN= 1.1 KM; ERZ= 3.0 KM; Q= C)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BLA 8.9 114 P 00:19:35.35 ( 0.0 ) S 00:19:37.00 ( 0.0)
NAV 26.2 288 P :37.85 ( 0.2 ) S :40.90 (-0.1 )
VWV 26.8 23 eP :37.20 (-0.6 ) S? :41.60 ( 0.4 )
PUV 36.5 228 eP :39.50 ( 0.2 ) S :43.80 ( 0.0 )
***** 12 AUGUST 1985; 00:44 - SWAN ISLAND, TENNESSEE *****
*TEIC OT= 00:44:03.3 LAT= 36.446N LON= 83.361W DEP= 10.5 KM MDB= 1.4
NO= 14, GAP= 172 DEG, RMS RES= 0.2 SEC, Q= C, SQD= B/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.8 KM; ERZ= 1.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
SMTN 17.6 114 iPd 00:44:06.78 ( 0.1 )
CCVA 32.4 302 eP+ :08.99 (-0.1 ) eS 00:44:13.31 ( 0.1 )
CRTN 51.0 238 ePd :11.87 (-0.2 ) eS :18.52 ( 0.0 )
CHTN 59.5 75 eS :19.17 (-1.7X)
LMTN 62.1 184 eP :13.79 (-0.1 ) eS :21.82 ( 0.2 )
TKL 95.0 203 eP :18.95 (-0.2 ) eS :30.53 (-0.2 )
ONTN 97.0 272 :18.66 (-0.8X) eS :31.40 ( 0.2 )
ORT 103.7 235 eS :33.13 ( 0.1 )
SLTN 111.3 90 eP :20.90 (-0.6X) eS :34.30 (-0.4X)
GBTN 115.5 221 eP :22.80 ( 0.5X) eS :35.40 (-0.8X)
ETT 158.8 218 eP :29.40 ( 0.5 ) eS :47.70 ( 0.2X)
BBG 179.1 193 eP :33.00 ( 1.1X) eS :53.90 ( 1.2X)
WMTN 197.3 228 eP :34.95 ( 0.1 ) eS :58.15 ( 0.4 )
SSKY 221.0 280 eS :45:04.70 ( 0.6X)
***** 15 AUGUST 1985; 17:31 - BLOCKHOUSE, TENNESSEE *****
*TEIC OT= 17:31:52.9 LAT= 35.666N LON= 83.949W DEP= 13.8 KM MDB= 2.3
NO= 21, GAP= 152 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.6 KM; ERZ= 0.4 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TKL 15.8 93 iPc 17:31:56.41 ( 0.0 ) eS 17:31:58.90 (-0.1 )
GBTN 23.7 270 iP :57.50 ( 0.0 ) iS :32:01.50 ( 0.7X)
CBT 45.0 252 P :32:00.80 ( 0.0 ) S :06.80 ( 0.2 )
TLT 50.6 217 P :01.80 ( 0.2 ) S :07.70 (-0.4 )
ETT 59.4 231 ePd :02.93 (-0.1 ) eS :10.90 ( 0.5X)
RCT 73.8 241 P :05.00 (-0.3 ) S :14.00 (-0.3 )
DCT 80.2 212 P :06.00 (-0.2 )
BBG 88.7 172 eP :07.51 ( 0.2 ) eS :18.00 ( 0.1 )
BHT 92.3 283 eP :08.08 ( 0.1 ) eS :19.52 ( 0.5X)
RBNC 93.8 111 ePc :08.10 ( 0.1 ) eS :19.12 ( 0.0 )
SMTN 105.3 41 ePd :09.15 (-0.8X)
RICH 105.9 75 eP :09.97 (-0.1 ) eS :22.30 (-0.3 )
DALG 138.4 224 S :32.10 ( 0.7X)
RCG 148.6 239 eP :18.00 ( 1.3X) eS :35.20 ( 1.2X)
BRBC 150.7 87 eP :17.03 ( 0.3 ) eS :34.33 ( 0.2 )
TRYN 160.7 106 eP :18.34 (-0.1 ) eS :37.49 ( 0.4X)
TVG 189.0 221 S :46.50 ( 1.7X)
PLVA 274.2 66 eP :32.71 (-1.9X) eS :33:03.72 (-1.4X)
-----
*GIT OT= 17:31:52.9 LAT= 35.674N LON= 83.954W DEP= 12.5 KM MDB= 1.8
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.3 KM, AZ= -65 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.2 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TKL 16.4 96 P 17:31:56.50 ( 0.2 ) S 17:31:58.60 (-0.2 )
GBTN 23.3 268 P :57.00 (-0.3 ) S :32:00.40 (-0.1 )
ORT 42.5 311 P :32:00.14 (-0.1 ) S :05.70 ( 0.2 )
CBT 44.9 251 P :00.80 ( 0.2 ) S :06.80 ( 0.6 )
TLT 51.1 216 P :01.80 ( 0.2 ) S :07.70 (-0.2 )
RCT 73.9 240 P :05.00 (-0.2 ) S :14.00 (-0.2 )
DCT 80.8 212 P :06.00 (-0.3 )
DALG 139.1 224 S :32.10 (-0.1 )
TVG 190.0 221 S :46.50 ( 0.4 )
***** 20 AUGUST 1985; 12:14 - LEWISBURG, TENNESSEE *****
*TEIC OT= 12:14:38.9 LAT= 35.496N LON= 86.815W DEP= 15.0 KM MDB= 1.6
NO= 12, GAP= 76 DEG, RMS RES= 0.1 SEC, Q= C, SQD= C/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.6 KM; ERZ= 8.8 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
COTN 34.9 336 ePc 12:14:45.38 ( 0.1 ) eS 12:14:49.86 (-0.1 )
MSAL 73.2 170 eP :51.19 ( 0.0 ) eS :59.90 (-0.2 )
ABTN 77.1 56 ePd :51.73 ( 0.0 ) eS :15:00.63 (-0.5X)
CPO 113.4 84 eP :57.90 ( 0.6X) eS :10.29 (-0.4 )
PWLA 127.4 243 eS :14.50 ( 0.1 )
RCG 145.6 113 eS :19.45 ( 0.2 )
ANTN 161.6 62 eP :15:04.91 ( 0.3 )
MOTN 163.2 320 eP :04.91 (-0.1 ) eS :25.10 ( 1.1X)
BGKY 169.5 9 eS :26.20 ( 0.6X)
WMTN 169.6 99 eP :06.12 ( 0.2 ) eS :26.25 ( 0.7X)
SSKY 171.1 33 eP :06.09 (-0.1 ) eS :26.68 ( 0.7X)
***** 22 AUGUST 1985; 17:54 - CANEY CREEK, TENNESSEE *****
*TEIC OT= 17:54:13.7 LAT= 35.086N LON= 84.594W DEP= 17.3 KM MDB= 1.2
NO= 15, GAP= 120 DEG, RMS RES= 0.2 SEC, Q= B, SQD= B/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.6 KM; ERZ= 1.2 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
DCT 16.3 102 P 17:54:17.90 ( 0.3 ) S 17:54:20.30 (-0.2 )
RCT 29.4 348 P :19.35 ( 0.0 )
ETT 29.5 25 eP :19.29 (-0.1 ) eS :23.60 ( 0.2 )
TLT 37.0 50 P :20.05 (-0.4 )
WMTN 38.9 298 eP :20.61 (-0.2 ) eS :25.89 ( 0.0 )
DALG 51.5 228 P :22.80 ( 0.2 )
CBT 52.7 17 P :23.00 ( 0.2 )
GBTN 73.2 28 eP :25.85 (-0.1 ) eS :34.49 (-0.4 )
BBG 75.2 108 eP :26.45 ( 0.3 ) eS :35.00 (-0.1 )
TKL 97.9 50 eP :33.15 ( 3.4X) eS :41.59 ( 0.2 )
-----
*GIT OT= 17:54:14.9 LAT= 35.122N LON= 84.558W DEP= 11.1 KM MDB= 0.6
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 1.0 KM, AZ= -12 DEG; ERHMIN= 0.7 KM; ELLIPSE AREA= 2.2 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
DCT 14.7 121 P 17:54:17.90 (-0.1 ) S 17:54:20.30 ( 0.1 )
ETT 24.5 23 P :19.70 ( 0.4 ) S :23.00 ( 0.4 )
RCT 26.5 339 P :19.35 (-0.3 )
TLT 31.9 52 P :20.05 (-0.4 )
CBT 47.9 15 P :23.00 ( 0.0 )
DALG 56.7 227 P :22.80 (-1.6 )
***** 23 AUGUST 1985; 07:56 - EAST CLEVELAND, TENNESSEE *****
*TEIC OT= 07:56:34.0 LAT= 35.194N LON= 84.769W DEP= 14.6 KM MDB= 1.2
NO= 26, GAP= 90 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 0.3 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCT 19.4 30 P 07:56:37.80 (-0.3 ) S 07:56:41.00 ( 0.0 )
WMTN 19.5 288 iPd :38.10 ( 0.0 ) iS :41.14 ( 0.1 )
ETT 32.1 63 ePd :39.90 ( 0.0 ) eS :44.26 ( 0.1 )
DCT 35.4 116 P :40.45 ( 0.1 )
TLT 45.8 75 S :47.15 (-0.7X)
CBT 49.7 40 P :42.30 (-0.3 ) S :47.80 (-1.1X)
DALG 51.5 206 P :42.90 ( 0.0 )
GBTN 72.9 44 eP :46.40 ( 0.2 ) eS :54.88 (-0.2 )
BHT 74.2 348 ePc :46.14 (-0.2 ) eS :55.40 ( 0.1 )
CPO 85.3 301 eS :58.20 (-0.1 )
ORT 89.8 28 eP :48.80 ( 0.0 ) eS :59.33 (-0.2 )
BBG 94.4 112 eS :57:00.48 ( 0.0 )
TVG 102.9 208 S :03.80 ( 0.8X)
TKL 104.0 60 P :50.90 (-0.1 ) eS :03.55 ( 0.2 )
LCAL 108.4 227 eP :51.30 (-0.3 ) eS :04.46 ( 0.1 )
HPK 114.5 45 eS :06.50 ( 0.4 )
ANTN 116.3 339 eP :52.67 (-0.1 ) eS :06.79 ( 0.3 )
CRTN 139.7 37 eP :57.40 ( 1.0X) eS :13.29 ( 0.6 )
ABTN 143.8 302 eS :14.00 ( 0.1 )
LMTN 145.5 58 eP :58.60 ( 1.3X) eS :13.70 (-0.6X)
-----
*GIT OT= 07:56:34.3 LAT= 35.196N LON= 84.749W DEP= 12.8 KM MDB= 0.9
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.5 KM, AZ= -38 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.3 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCT 18.4 26 P 07:56:38.00 ( 0.0 ) S 07:56:41.00 ( 0.3 )
DCT 34.0 118 P :40.45 ( 0.2 )
TLT 44.0 75 S :47.15 (-0.2 )
CBT 48.3 38 P :42.40 (-0.1 ) S :48.05 (-0.5 )
DALG 52.6 207 P :42.90 (-0.3 )
TVG 104.1 209 S :57:03.80 (-0.1 )
***** 25 AUGUST 1985; 01:52 - MASCOT, TENNESSEE *****
*TEIC OT= 01:52:46.7 LAT= 36.099N LON= 83.697W DEP= 3.7 KM MDB= 1.7
NO= 29, GAP= 60 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.2 KM; ERZ= 0.5 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 17.2 311 eP 01:52:50.52 ( 0.8X) iS 01:52:52.95 ( 1.0X)
HPK 25.3 221 eP :51.00 (-0.2 ) eS :54.20 ( 0.3 )
LMTN 34.9 132 eP :52.86 ( 0.0 ) eS :57.41 ( 0.1 )
TKL 49.4 188 eP :55.20 (-0.1 ) iS :53:01.68 ( 0.1 )
SMTN 55.9 56 eP :56.50 ( 0.2 ) iS :03.10 (-0.3 )
CCVA 56.0 3 eP :56.43 ( 0.1 ) eS :03.50 ( 0.1 )
ORT 58.7 249 eP :57.05 ( 0.2 ) eS :04.39 ( 0.1 )
GBTN 66.8 224 eP :58.20 ( 0.0 ) eS :06.00 (-0.6X)
ONTN 79.4 302 eS :10.00 (-0.1 )
RICH 81.6 104 eP :53:01.20 ( 0.7X) eS :10.05 (-0.6X)
CBT 90.2 227 P :02.00 (-0.1 ) S :12.40 (-0.9X)
TLT 103.2 211 P :04.00 (-0.2 ) S :15.90 (-1.0X)
RBNC 104.4 142 iPd :04.18 ( 0.0 ) eS :17.10 ( 0.2 )
ETT 109.8 219 eP :05.80 ( 0.6X) eS :17.63 (-1.2X)
RCT 120.9 226 S :20.95 (-0.9X)
DCT 133.1 209 P :08.40 (-0.4X) S :24.00 (-1.0X)
BRBC 133.5 107 eP :08.65 ( 0.0 ) eS :24.58 ( 0.0 )
BBG 136.3 184 iP :09.20 ( 0.0 ) eS :25.60 ( 0.1 )
ANTN 138.4 273 eP :09.62 ( 0.0 )
SLTN 146.6 75 eP :10.71 (-0.1 ) eS :28.06 (-0.3 )
WMTN 149.2 231 eP :11.65 ( 0.3 ) eS :29.20 (-0.1 )
TRYN 160.5 125 eS :31.00 (-1.1X)
DALG 189.4 219 S :40.00 ( 0.1 )
BENN 193.3 108 eS :41.58 ( 0.8X)
PKNC 228.7 91 eP :23.30 (-0.1 ) eS :51.20 ( 1.0X)
PLVA 236.1 75 eP :25.50 ( 1.1X) eS :52.00 ( 0.0X)
TVG 240.5 217 S :53.95 ( 0.5X)
-----
*GIT OT= 01:52:47.5 LAT= 36.063N LON= 83.699W DEP= 16.6 KM MDB= 1.5
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.6 KM, AZ= -31 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.3 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TKL 45.4 189 P 01:52:55.20 (-0.1 ) S 01:53:00.85 (-0.3 )
GBTN 63.9 226 P :58.30 ( 0.1 ) S :05.95 (-0.1 )
CBT 87.5 228 P :53:02.00 ( 0.1 ) S :12.40 (-0.1 )
TLT 99.8 212 P :04.00 ( 0.2 ) S :15.90 ( 0.0 )
RCT 118.3 228 S :20.95 ( 0.0 )
DCT 129.8 210 P :08.40 (-0.2 ) S :24.00 (-0.1 )
BBG 132.3 184 P :09.00 ( 0.0 ) S :25.30 ( 0.6 )
DALG 186.8 220 S :40.00 ( 0.5 )
TVG 238.1 218 S :53.95 ( 0.7 )
***** 2 SEPTEMBER 1985; 04:34 - COLUMBIA, VIRGINIA *****
*VTSO OT= 04:34:03.9 LAT= 37.766N LON= 78.133W DEP= 8.2 KM MDB= 0.6
NO= 5, GAP= 353 DEG, RMS RES= 0.1 SEC, Q= D, SQD= D/D
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 3.1 KM, AZ= 1 DEG; ERHMIN= 1.0 KM; ERZ= 2.0 KM; Q= C)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GHV 3.8 36 iPu 04:34:05.30 (-0.1 ) iS 04:34:06.55 ( 0.1 )
NA12 32.8 43 iPu :09.55 ( 0.1 ) iS :13.45 (-0.1 )
CVL 37.5 310 eS :14.80 ( 0.0 )
Additional Data: Operator - VDMR
STA PHASE ARRIVAL TIME PHASE ARRIVAL TIME
CVV Pg 04:34:11.6 Sg 04:34:14.2
***** 2 SEPTEMBER 1985; 04:58 - COLUMBIA, VIRGINIA *****
*VTSO OT= 04:58:00.5 LAT= 37.737N LON= 78.164W DEP= 10.0 KM MDB= 0.9
NO= 7, GAP= 355 DEG, RMS RES= 0.2 SEC, Q= D, SQD= C/D
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 1.4 KM, AZ= 20 DEG; ERHMIN= 1.1 KM; ERZ= 2.0 KM; Q= B)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GHV 8.1 38 iPd 04:58:02.81 ( 0.2 ) iS 04:58:04.01 (-0.1 )
NA12 37.1 42 iPd :07.05 ( 0.3 ) eS :11.11 (-0.3 )
CVL 37.7 316 eS :11.46 (-0.1 )
NA2 56.8 40 eS :16.93 ( 0.1 )
PBV 100.7 146 eS :29.06 (-0.1 )
Additional Data: Operator - VDMR
STA PHASE ARRIVAL TIME PHASE ARRIVAL TIME
CVV Pg 04:58:07.3 Sg 04:58:11.6
***** 17 SEPTEMBER 1985; 16:25 - WHITE OAK FLATS, TENNESSEE *****
*TEIC OT= 16:25:08.1 LAT= 35.490N LON= 84.044W DEP= 10.6 KM MDB= 1.8
NO= 34, GAP= 64 DEG, RMS RES= 0.2 SEC, Q= B, SQD= B/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 0.5 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
UGRT 15.0 334 eP 16:25:11.25 ( 0.1 )
LRKT 18.5 30 eP :11.95 ( 0.4 ) eS 16:25:14.25 ( 0.1 )
GBTN 24.7 322 iPc :12.73 ( 0.1 ) eS :16.00 ( 0.1 )
TLT 30.2 226 P :13.60 ( 0.2 ) S :17.90 ( 0.5X)
TKL 30.8 53 iPd :13.43 (-0.1 ) iS :17.44 (-0.2 )
CBT 34.6 279 P :14.00 (-0.2 ) S :18.00 (-0.6X)
ETT 41.5 244 iPd :15.36 ( 0.1 ) iS :20.69 ( 0.2 )
HPK 50.6 17 eP :17.11 ( 0.3 ) eS :22.20 (-1.0X)
ORT 52.2 333 eP :16.82 (-0.2 ) eS :23.35 (-0.2 )
RCT 58.3 254 P :18.00 (-0.1 ) S :25.25 (-0.1 )
DCT 59.2 215 P :17.95 (-0.2 ) S :25.20 (-0.3 )
BBG 71.6 163 eP :19.93 (-0.1 ) eS :28.75 (-0.1 )
LMTN 72.6 52 eP :19.55 (-0.8X) eS :28.30 (-1.0X)
CRTN 80.9 13 eP :21.14 (-0.5X) eS :30.61 (-1.0X)
WMTN 88.6 252 eP :22.60 (-0.3 ) eS :33.49 (-0.2 )
RHT 88.9 239 P :23.00 ( 0.1 ) S :33.20 (-0.6X)
BHT 90.6 296 eP :23.20 ( 0.1 ) eS :33.80 (-0.3X)
RBNC 97.3 99 eP :24.03 ( 0.1 ) eS :35.70 ( 0.1 )
DALG 118.7 228 P :27.00 (-0.5X) S :41.50 (-0.2X)
RICH 120.7 67 eP :29.22 ( 1.5X) eS :43.72 ( 1.7X)
SMTN 125.9 38 iP- :28.54 ( 0.0 ) eS :43.55 ( 0.1 )
CCVA 128.1 15 eS :43.58 (-0.5X)
ANTN 131.3 305 eP :29.11 (-0.3 ) eS :46.13 ( 1.2X)
CPO 139.0 275 eS :47.10 ( 0.1 )
BRBC 161.7 80 eP :33.90 ( 0.1 ) eS :53.18 ( 0.6X)
ABTN 192.0 283 eP :33.50 (-5.2X) eS :26:01.34 ( 0.2 )
SLTN 203.2 59 eP :40.17 (-0.1 )
GFM 213.7 71 eS :08.10 ( 1.7X)
SSKY 213.9 313 eP :42.50 ( 0.4 ) eS :07.80 ( 0.9X)
BENN 216.4 88 eS :09.09 ( 1.7X)
-----
*GIT OT= 16:25:08.1 LAT= 35.496N LON= 84.058W DEP= 15.1 KM MDB= 1.8
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.5 KM, AZ= -58 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.3 SQ KM)
6 Stations Used (NO= 12): TLT (Dmin= 29.8 km), CBT, RCT, DCT, RHT and DALG
See TEIC listing for arrival time data
***** 22 SEPTEMBER 1985; 03:11 - TALLASSEE, TENNESSEE *****
*TEIC OT= 03:11:35.3 LAT= 35.593N LON= 84.077W DEP= 18.1 KM MDB= -0.3
NO= 8, GAP= 154 DEG, RMS RES= 0.1 SEC, Q= C, SQD= B/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 1.2 KM; ERZ= 1.2 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
LRKT 13.1 70 P 03:11:39.00 ( 0.1 ) S 03:11:41.55 ( 0.0 )
GBTN 14.6 304 eP :39.20 ( 0.1 ) eS :41.80 (-0.1 )
TKL 28.4 75 eP :40.81 ( 0.0 ) eS :44.75 (-0.2 )
ETT 45.3 229 eP :43.38 ( 0.1 ) eS :48.81 (-0.3 )
***** 22 SEPTEMBER 1985; 21:54 - MEADOWS, TENNESSEE *****
*TEIC OT= 21:54:33.7 LAT= 35.746N LON= 84.247W DEP= 17.8 KM MDB= -0.1
NO= 6, GAP= 142 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.8 KM; ERZ= 1.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 9.5 160 eP 21:54:37.10 ( 0.1 ) eS 21:54:39.40 ( 0.0 )
ORT 18.9 344 ePc :37.64 (-0.3 ) iS :41.15 ( 0.1 )
TKL 43.9 103 eS :47.20 ( 0.0 )
ETT 50.3 202 eS :48.78 ( 0.0 )
***** 24 SEPTEMBER 1985; 00:01 - BINFIELD, TENNESSEE *****
*TEIC OT= 00:01:12.0 LAT= 35.718N LON= 84.011W DEP= 19.4 KM MDB= 1.7
NO= 24, GAP= 44 DEG, RMS RES= 0.2 SEC, Q= B, SQD= B/A
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.4 KM; ERZ= 0.7 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
LRKT 11.2 146 iPc 00:01:16.10 ( 0.5 ) eS 00:01:18.50 ( 0.3 )
GBTN 19.0 252 iP :16.30 (-0.2 ) eS :19.70 ( 0.0 )
TKL 22.5 107 iPd :17.09 ( 0.2 ) iS :20.13 (-0.3 )
HPK 26.0 27 iPd :17.40 ( 0.1X) iS :21.10 (-0.1 )
ORT 34.0 309 iPc :18.65 ( 0.2 ) iS :23.11 ( 0.0 )
CBT 42.0 242 P :19.90 ( 0.3 ) S :24.95 (-0.2X)
TLT 52.4 208 P :21.10 ( 0.0 ) S :27.20 (-0.5X)
CRTN 55.7 16 iP+ :21.61 ( 0.0 ) iS :28.60 ( 0.0 )
LMTN 57.7 71 iPd :21.77 (-0.1 ) eS :29.69 ( 0.6X)
ETT 59.2 223 iPc :22.09 ( 0.0 ) eS :29.40 (-0.1 )
RCT 72.0 235 P :24.00 (-0.1 ) S :32.05 (-0.9X)
DCT 82.4 207 P :26.00 ( 0.3X) S :35.40 (-0.2 )
BHT 85.6 280 eP :26.44 ( 0.4X) eS :37.42 ( 1.1X)
ONTN 93.3 335 iP :27.18 (-0.1 ) iS :39.03 ( 0.6X)
BBG 95.3 169 eP :27.70 ( 0.2 ) eS :38.30 (-0.5X)
RBNC 101.3 113 eP :29.40 ( 1.1X) eS :40.29 ( 0.1 )
WMTN 101.7 239 iP- :28.71 ( 0.1 )
RHT 106.3 228 S :42.00 ( 0.0 )
RICH 110.1 78 eS :44.20 ( 1.4X)
CPO 141.8 264 eP :35.17 ( 0.4X) eS :51.45 ( 0.1 )
SLTN 188.3 65 eP :42.10 ( 0.4X) eS :02:05.44 ( 2.0X)
TVG 189.8 218 P :43.10 ( 1.0X) S :05.00 ( 0.9X)
ABTN 190.6 276 eP :42.16 (-0.1X) eS :04.79 ( 0.5X)
LCAL 198.4 228 eP :43.60 ( 0.2X) eS :07.20 ( 0.9X)
GFM 203.7 78 iS :08.88 ( 1.5X)
-----
*GIT OT= 00:01:13.0 LAT= 35.686N LON= 84.055W DEP= 19.1 KM MDB= 1.7
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.7 KM, AZ= -42 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.4 SQ KM)
6 Stations Used (NO= 11): CBT (Dmin= 36.9 km), TLT, RCT, DCT, RHT and TVG
See TEIC listing for arrival time data
***** 27 SEPTEMBER 1985; 02:51 - TELLICO PLAINS, TENNESSEE *****
*TEIC OT= 02:51:03.4 LAT= 35.367N LON= 84.278W DEP= 16.7 KM MDB= -0.1
NO= 7, GAP= 199 DEG, RMS RES= 0.1 SEC, Q= C, SQD= B/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 1.3 KM; ERZ= 1.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ETT 16.7 254 eP 02:51:07.50 ( 0.2 ) eS 02:51:10.03 (-0.1 )
GBTN 33.7 10 eP :09.49 (-0.2 ) eS :14.30 ( 0.1 )
TKL 56.0 55 eS :20.00 ( 0.0 )
WMTN 64.6 258 eP :14.38 ( 0.1 ) eS :22.24 ( 0.0 )
***** 5 OCTOBER 1985; 19:33 - BLACKSBURG, VIRGINIA *****
*VTSO This event is a probable aftershock to the Blacksburg, Virginia,
earthquake of 10 June 1985; 12:22 (see SEUSSN Bulletin 16, page 34)
*VTSO OT= 19:33:03.8 LAT= 37.211N LON= 80.378W DEP= 9.3 KM MDB= -0.5
NO= 6, GAP= 273 DEG, RMS RES= 0.2 SEC, Q= D, SQD= D/D
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 4.4 KM, AZ= -42 DEG; ERHMIN= 2.3 KM; ERZ= 3.8 KM; Q= C)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BLA 3.8 271 iPd 19:33:05.70 ( 0.0 ) iS 19:33:06.90 ( 0.0 )
VWV 28.3 358 eP :08.70 (-0.3 ) eS :12.80 ( 0.3 )
NAV 38.7 288 eP :11.00 ( 0.3 ) eS :15.10 (-0.2 )
***** 10 OCTOBER 1985; 08:43 - TAZEWELL, TENNESSEE *****
*TEIC OT= 08:43:56.7 LAT= 36.456N LON= 83.525W DEP= 15.1 KM MDB= 1.7
NO= 17, GAP= 117 DEG, RMS RES= 0.2 SEC, Q= B, SQD= B/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.6 KM; ERZ= 2.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CCVA 20.6 322 eP 08:44:00.96 ( 0.1 ) eS 08:44:03.86 (-0.1 )
SMTN 31.9 105 eP :02.75 ( 0.3 ) eS :06.20 (-0.6 )
CRTN 40.1 225 iPd :03.71 (-0.1 ) iS :09.22 ( 0.2 )
LMTN 63.9 171 eP :07.28 (-0.2 )
CHTN 73.6 79 eP :08.71 (-0.2 ) eS :17.97 ( 0.1 )
ONTN 82.3 272 eP :09.78 (-0.5X) eS :20.16 ( 0.0 )
RICH 87.1 133 eP :10.90 ( 0.0 ) eS :21.70 ( 0.4 )
TKL 91.3 194 eP :11.50 (-0.2 ) eS :22.60 ( 0.0 )
GBTN 107.2 215 eP :15.80 ( 1.7X) eS :26.70 (-0.1 )
WSSR 130.8 182 eP :17.60 ( 0.1 ) eS :35.20 ( 2.4X)
ANTN 156.5 258 eP :20.94 (-0.7X)
BBG 177.4 188 eP :23.50 (-1.2X) eS :45.30 ( 0.2 )
***** 11 OCTOBER 1985; 01:47 - NORTH WILMINGTON, DELAWARE *****
*DGS Felt in the Alapocas Woods area of North Wilmington, Delaware
*DGS OT= 01:47:50.7 LAT= 39.768N LON= 75.559W MDB= 1.9
NO= 3, GAP= 162 DEG, AVG DURATION= 22 sec
STA DIST (KM) AZM PHASE ARRIVAL TIME
BWD 4.1 337 iPd 01:47:51.6
BVD 5.2 80 iPc :51.5
NED 14.6 241 iPc :53.2
***** 18 OCTOBER 1985; 01:45 - LAKE JOCASSEE, SOUTH CAROLINA *****
*NOTE The following also appears in the USC reservoir activity listing
and is considered to be reservoir related
*TEIC OT= 01:45:29.4 LAT= 35.087N LON= 82.982W DEP= 4.6 KM MDB= 2.1
NO= 17, GAP= 82 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.5 KM; ERZ= 0.6 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BG3 11.4 156 P 01:45:31.70 ( 0.1 ) S 01:45:33.06 (-0.1 )
LPM 12.5 198 P :31.91 ( 0.1 ) S :33.42 (-0.1 )
SMT 17.0 176 P :32.67 ( 0.1 ) S :34.72 (-0.1 )
RBNC 30.0 359 ePc :34.58 ( 0.1 ) eS :38.09 (-0.1 )
WSSR 58.3 291 eP :39.20 ( 0.0 ) eS :46.10 (-0.3 )
TRYN 70.0 73 ePc :40.91 (-0.3 ) eS :49.39 (-0.5 )
BBG 79.3 253 eP :42.60 (-0.1 ) eS :52.60 ( 0.2 )
RICH 93.6 9 eP :44.00 (-1.1X)
TKL 95.9 311 eS :56.58 (-0.9X)
LDV 107.5 165 P :47.60 ( 0.0 )
GBTN 128.8 300 eP :52.10 ( 1.3X) eS :46:08.70 ( 2.3X)
DCT 131.1 268 P :52.00 ( 0.9X) S :09.80 ( 2.8X)
ETT 136.8 281 P :52.59 ( 0.6X) eS :09.53 ( 1.1X)
CH6 140.5 162 S :10.80 ( 1.2X)
GFM 155.8 43 ePc :54.92 ( 0.3 )
GMG 156.1 261 eP :54.10 (-0.7X) eS :15.80 ( 2.4X)
CCVA 179.2 340 eP :46:00.28 ( 1.8X) eS :21.65 ( 1.9X)
DALG 188.9 259 S :27.00 ( 4.4X)
PKNC 196.6 57 ePc :01.39 ( 0.3 ) eS :27.11 ( 2.9X)
RCG 216.4 267 eS :33.60 ( 4.0X)
TVG 226.7 250 P :07.50 ( 1.7X)
PLVA 240.3 43 eP :07.20 (-0.5X) eS :35.50 (-0.2X)
-----
*GIT OT= 01:45:29.9 LAT= 35.085N LON= 82.924W DEP= 4.9 KM MDB= 1.9
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 1.2 KM, AZ= -22 DEG; ERHMIN= 0.8 KM; ELLIPSE AREA= 2.8 SQ KM)
8 Stations Used (NO= 12): BG3 (Dmin= 10.2 km), LPM, SMT, LDV, DCT,
CH6, DALG, and TVG
See TEIC listing for arrival time data
***** 20 OCTOBER 1985; 07:55 - NORTH WILMINGTON, DELAWARE *****
*DGS Felt in the Alapocas Woods area of North Wilmington, Delaware
*DGS OT= 07:55:26.6 LAT= 39.764N LON= 75.551W MDB= 1.7
NO= 3, GAP= 162 DEG, AVG DURATION= 18 sec
STA DIST (KM) AZM PHASE ARRIVAL TIME
BWD 4.5 331 iPd 07:55:27.4
BVD 4.6 75 iP :27.4
NED 15.0 244 iP :29.3
***** 22 OCTOBER 1985; 05:15 - MONROE COUNTY, TENNESSEE *****
*TEIC considers this location to be unreliable
*TEIC OT= 05:15:47.5 LAT= 35.537N LON= 84.298W DEP= 27.0 KM MDB= 0.0
NO= 5, GAP= 275 DEG, RMS RES= 0.2 SEC, Q= D, SQD= C/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 4.4 KM; ERZ= 3.9 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 16.4 29 eS 05:15:56.30 ( 0.1 )
CCRT 23.5 110 P 05:15:52.30 (-0.8X) eS :57.20 ( 0.0 )
BSPT 27.1 39 P :53.30 ( 0.1 ) S :57.90 ( 0.1X)
LRKT 34.0 71 S :59.00 (-0.4 )
WSSR 71.4 114 eS :16:08.60 ( 0.3 )
***** 5 NOVEMBER 1985; 00:59 - DUTCH VALLEY, TENNESSEE *****
*TEIC OT= 00:59:29.2 LAT= 36.327N LON= 83.622W DEP= 7.9 KM MDB= 1.5
NO= 19, GAP= 195 DEG, RMS RES= 0.2 SEC, Q= C, SQD= B/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.8 KM; ERZ= 1.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 24.2 234 iPd 00:59:33.94 ( 0.4 ) iS 00:59:37.84 ( 1.1X)
SMTN 39.9 81 iP :36.11 ( 0.0 )
HPK 50.1 208 eP :37.20 (-0.7X) eS :44.20 ( 0.1 )
CSPT 65.4 196 P :40.10 ( 0.0 ) S :48.20 ( 0.0X)
TKL 75.5 190 ePd :41.88 (-0.2 ) eS :51.39 ( 0.0 )
ONTN 75.7 283 ePc :40.84 (-1.2X) eS :50.32 (-1.0X)
ORT 77.0 233 eP :42.20 (-0.1 ) eS :51.71 (-0.1 )
BSPT 79.8 213 P :42.30 (-0.2 ) S :52.00 (-0.2X)
LRKT 82.1 201 P :42.70 (-0.4 ) S :53.40 ( 0.3 )
GBTN 90.5 216 eP :44.20 (-0.3 ) eS :54.80 (-0.9X)
CBT 113.3 220 P :47.90 (-0.1 ) S 01:00:02.00 ( 0.3 )
BHT 130.5 246 eS :06.42 ( 0.3 )
ETT 134.2 214 eP :50.55 (-0.6X) eS :07.30 ( 0.1 )
RCT 143.8 221 S :10.30 ( 0.5X)
DCT 158.6 207 P :54.85 (-0.1 ) S :13.60 (-0.1 )
BBG 162.1 186 eP :55.60 ( 0.3X) eS :15.20 ( 0.9X)
RHT 179.5 219 S :19.50 ( 0.2 )
GMG 188.2 210 eS :22.50 ( 1.2X)
TVG 264.7 215 S :42.50 ( 1.6X)
-----
*GIT OT= 00:59:28.5 LAT= 36.354N LON= 83.596W DEP= 16.9 KM MDB= 1.3
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.8 KM, AZ= -33 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.4 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 27.9 232 P 00:59:33.94 ( 0.1 ) S 00:59:37.84 ( 0.1 )
HPK 53.9 208 P :37.20 (-0.5 ) S :44.20 (-0.3 )
TKL 78.9 192 P :41.81 ( 0.2 ) S :51.61 ( 0.4 )
CBT 117.3 220 P :47.90 ( 0.2 ) S 01:00:02.00 ( 0.3 )
RCT 148.0 221 S :10.30 ( 0.2 )
DCT 162.6 208 P :54.85 ( 0.1 ) S :13.60 (-0.5 )
RHT 183.9 220 S :19.50 (-0.3 )
TVG 269.7 216 S :42.50 ( 0.0 )
***** 7 NOVEMBER 1985; 08:17 - GWINNETT COUNTY, GEORGIA *****
*GIT This event is considered to be a blast
For informational purposes only
*TEIC OT= 08:17:13.0 LAT= 33.766N LON= 84.071W DEP= 1.1 KM MDB= 1.8
NO= 19, GAP= 223 DEG, RMS RES= 0.4 SEC, Q= D, SQD= C/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 2.1 KM; ERZ= 3.4 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BBG 125.3 11 eP 08:17:33.70 (-0.3X) eS 08:17:48.70 (-0.7 )
BEV 128.8 74 P :34.60 (-0.2 ) S :50.10 (-0.6 )
TVG 132.3 301 P :38.40 ( 3.1X)
GMG 133.6 336 eP :37.60 ( 2.3X) eS :51.70 ( 0.1 )
DCT 146.5 347 eP :37.00 (-0.4X) eS :59.80 ( 4.6X)
WSSR 173.8 15 eP :41.40 (-0.1 ) eS :18:02.50 ( 0.3 )
ETT 176.7 348 ePc :41.89 (-0.2 ) eS :02.70 (-0.5 )
RCG 178.3 319 eP :44.50 ( 2.2X) eS :08.70 ( 5.0X)
RCT 183.4 343 eS :04.55 (-0.5X)
WMTN 184.2 333 eP :44.16 ( 0.9 ) eS :05.57 ( 0.3 )
RBNC 202.7 29 eP :46.08 ( 0.3 ) eS :10.60 ( 0.9 )
GBTN 211.2 357 eP :46.80 (-0.6 ) eS :11.60 (-0.8X)
PDTN 233.8 316 eP :50.64 (-0.2 ) eS :19.77 ( 1.4X)
TRYN 236.3 45 eP :51.47 ( 0.4 ) eS :19.30 ( 0.4 )
ORT 238.8 355 eP :51.13 (-0.5 ) eS :20.54 ( 0.8X)
LMTN 243.2 14 eP :51.59 (-0.6X) eS :21.01 ( 0.2X)
RICH 265.0 26 eP :55.70 ( 0.5X) eS :29.10 ( 3.1X)
MSAL 267.9 297 eP :56.14 ( 0.4 ) eS :27.21 ( 0.3 )
CRTN 270.9 4 eP :56.01 ( 0.0X) eS :27.73 ( 0.3X)
BRBC 273.1 37 eP :57.00 ( 1.0X)
ABTN 300.2 322 eS :34.40 ( 0.7X)
***** 7 NOVEMBER 1985; 11:02 - BOWMAN, SOUTH CAROLINA *****
*USC OT= 11:02:19.7 LAT= 33.629N LON= 80.700W DEP= 0.8 KM MDL= 1.9
NO= 6, GAP= 186 DEG, RMS RES= 0.2 SEC, Q= D, SQD= C/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 2.6 KM; ERZ= 99.9 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
COW 27.1 180 Pu 11:02:24.52 ( 0.1 ) S 11:02:27.95 (-0.3 )
SGS 51.4 160 P :28.20 (-0.2X) S :35.00 (-0.5X)
JSC 88.9 324 Pd :34.25 ( 0.1 ) S :45.80 (-0.2 )
LHS 94.9 354 Pd :35.00 (-0.1 ) S :48.00 ( 0.3X)
PRM 161.8 288 Pd :46.00 ( 0.0 ) S :03:05.50 (-2.0X)
Additional Data: Savannah River Labs
STA PHASE ARRIVAL TIME PHASE ARRIVAL TIME
SRPN eP 11:02:34.2 S 11:02:46.3
***** 20 NOVEMBER 1985; 03:10 - SWEETWATER, TENNESSEE *****
*TEIC OT= 03:10:02.4 LAT= 35.501N LON= 84.448W DEP= 17.4 KM MDB= 1.1
NO= 17, GAP= 136 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.4 KM; ERZ= 0.5 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CBT 5.0 30 P 03:10:05.30 (-0.1 ) S 03:10:07.60 ( 0.1 )
ETT 19.4 182 ePc :06.81 ( 0.2 ) eS :09.68 (-0.1 )
RCT 25.9 228 P :07.20 (-0.4 ) S :10.90 (-0.4 )
GBTN 28.3 49 eP :07.80 (-0.1 ) eS :11.50 (-0.4 )
ORT 47.2 16 eP :10.72 ( 0.1 ) eS :16.70 ( 0.0 )
DCT 49.6 177 P :11.10 ( 0.1 ) S :17.00 (-0.3 )
WMTN 55.3 240 ePd :11.90 ( 0.0 ) eS :18.88 ( 0.0 )
GMG 73.6 196 eS :23.50 ( 0.1 )
WSSR 82.8 107 eP :16.10 ( 0.2 ) eS :25.60 (-0.2 )
TVG 147.1 212 S :44.10 ( 0.9X)
-----
*GIT OT= 03:10:02.5 LAT= 35.501N LON= 84.462W DEP= 16.7 KM MDB= 0.8
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.6 KM, AZ= -23 DEG; ERHMIN= 0.3 KM; ELLIPSE AREA= 0.5 SQ KM)
4 Stations Used (NO= 7): CBT (Dmin= 5.7 km), RCT, DCT, and TVG
See TEIC listing for arrival time data
***** 22 NOVEMBER 1985; 13:19 - JOHN SEVIER, TENNESSEE *****
*TEIC OT= 13:19:26.5 LAT= 36.100N LON= 83.815W DEP= 10.6 KM MDB= 1.5
NO= 12, GAP= 115 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.5 KM; ERZ= 0.6 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 11.3 348 ePc 13:19:29.08 ( 0.0 ) iS 13:19:31.03 ( 0.1 )
HPK 20.2 197 eP :30.50 ( 0.1 ) eS :33.20 ( 0.0 )
LMTN 43.5 123 eP :33.84 (-0.2 ) eS :39.59 ( 0.0 )
ORT 49.0 244 eP :34.80 (-0.2 ) eS :41.70 ( 0.6X)
TKL 49.2 176 eS :41.03 (-0.2 )
GBTN 60.0 217 eS :43.20 (-1.1X)
RICH 92.0 103 eS :52.90 ( 0.0 )
WSSR 93.8 167 eP :42.70 ( 0.8X) eS :53.30 ( 0.1 )
BBG 136.1 180 eS :20:04.70 ( 0.3 )
WMTN 141.2 228 eP :49.40 ( 0.0 ) eS :07.40 ( 1.3X)
***** 23 NOVEMBER 1985; 14:36 - BRAYTON, TENNESSEE *****
*TEIC OT= 14:36:15.9 LAT= 35.409N LON= 85.244W DEP= 22.0 KM MDB= 0.9
NO= 13, GAP= 68 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 1.0 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
WMTN 30.4 126 iPc 14:36:22.00 ( 0.0 ) iS 14:36:26.20 (-0.2 )
CPO 36.1 305 iPc :22.70 ( 0.0 ) iS :27.72 ( 0.0 )
RCG 49.1 191 eP :22.70 (-1.9X) eS :30.90 ( 0.0 )
BHT 55.6 29 eP :25.41 (-0.1 ) eS :32.59 ( 0.1 )
PDTN 57.1 255 ePd :25.72 (-0.1 ) iS :33.10 ( 0.1 )
ETT 72.2 97 eS :36.99 ( 0.1 )
ANTN 84.6 1 eP :29.68 (-0.2 ) eS :40.07 ( 0.0 )
ABTN 94.6 304 eP :31.99 ( 0.6X) eS :42.85 ( 0.1 )
SHTN 171.4 272 eP :42.85 (-0.3X) eS :37:03.69 ( 0.6X)
***** 26 NOVEMBER 1985; 02:28 - SWEETWATER, TENNESSEE *****
*TEIC OT= 02:28:51.7 LAT= 35.513N LON= 84.481W DEP= 14.1 KM MDB= 1.2
NO= 7, GAP= 194 DEG, RMS RES= 0.1 SEC, Q= C, SQD= B/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 1.2 KM; ERZ= 2.0 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CBT 6.2 62 P 02:28:54.50 ( 0.1 ) eS 02:28:55.50 (-0.9X)
ETT 20.9 174 eP :56.25 ( 0.1 ) eS :59.28 ( 0.0 )
RCT 24.8 221 P :56.70 ( 0.1 ) eS :29:00.00 (-0.2 )
GBTN 29.8 55 eP :57.40 ( 0.0 ) eS :01.30 (-0.2 )
-----
*GIT OT= 02:28:52.7 LAT= 35.500N LON= 84.481W DEP= 7.5 KM MDB= 0.8
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.4 KM, AZ= -35 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.2 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CBT 7.1 51 P 02:28:54.50 ( 0.1 ) S 02:28:55.50 (-0.2 )
RCT 23.7 224 P :56.70 (-0.1 ) S :29:00.00 ( 0.2 )
DCT 49.7 174 S :07.10 ( 0.0 )
***** 28 NOVEMBER 1985; 22:49 - TELLICO PLAINS, TENNESSEE *****
*TEIC OT= 22:49:08.9 LAT= 35.317N LON= 84.270W DEP= 17.7 KM MDB= 0.0
NO= 11, GAP= 111 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.4 KM; ERZ= 0.5 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TLT 2.1 215 P 22:49:12.20 ( 0.4 ) S 22:49:13.80 (-0.1 )
ETT 16.9 273 eP :13.91 ( 1.0X) eS :15.83 ( 0.1 )
CBT 28.2 331 P :14.50 ( 0.1 ) S :18.40 ( 0.0 )
DCT 32.2 205 P :14.90 ( 0.0 ) S :18.50 (-0.8X)
RCT 35.7 275 S :20.00 (-0.3 )
GBTN 39.1 8 eP :16.10 ( 0.2 ) eS :21.00 (-0.1 )
GMG 62.2 216 eP :20.70 ( 1.4X) eS :27.60 ( 0.7X)
WSSR 63.0 94 eP :24.90 ( 5.5X) eS :27.00 (-0.1 )
WMTN 64.5 263 eS :27.70 ( 0.0 )
RCG 105.4 249 eS :41.20 ( 2.7X)
-----
*GIT OT= 22:49:09.7 LAT= 35.303N LON= 84.317W DEP= 13.7 KM MDB= 0.4
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.5 KM, AZ= 6 DEG; ERHMIN= 0.4 KM; ELLIPSE AREA= 0.6 SQ KM)
4 Stations Used (NO= 7): TLT (Dmin= 3.1 km), CBT, DCT, and RCT
See TEIC listing for arrival time data
***** 8 DECEMBER 1985; 04:45 - LOUISVILLE, TENNESSEE *****
*TEIC OT= 04:45:58.1 LAT= 35.787N LON= 84.047W DEP= 16.7 KM MDB= 1.5
NO= 17, GAP= 82 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.4 KM; ERZ= 0.9 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 20.0 228 iP 04:46:02.30 (-0.1 ) iS 04:46:05.40 (-0.1 )
HPK 21.6 44 eP :02.60 ( 0.0 ) eS :05.80 (-0.1 )
ORT 27.0 300 iPc :03.46 ( 0.2 ) iS :07.32 ( 0.2 )
TKL 28.5 120 iPc :03.69 ( 0.2 ) eS :07.59 ( 0.1 )
CRTN 49.4 22 ePc :06.61 ( 0.0 ) iS :12.48 (-0.4X)
LMTN 58.8 79 eP :07.77 (-0.3 ) eS :15.08 (-0.3 )
ETT 63.1 216 ePc :08.61 (-0.1 ) eS :16.25 (-0.2 )
WSSR 70.7 143 eP :10.03 ( 0.3 ) eS :18.40 ( 0.2 )
WMTN 103.1 235 eP :14.90 ( 0.0 )
BBG 103.5 168 eP :14.90 ( 0.1 ) eS :20.90 (-6.1X)
RICH 111.8 82 eP :25.20 ( 9.1X) eS :31.10 ( 1.8X)
GMG 117.2 209 eS :31.10 ( 0.5X)
SLTN 188.1 67 eP :28.60 ( 0.9X)
-----
*GIT OT= 04:45:59.6 LAT= 35.728N LON= 84.093W DEP= 20.9 KM MDB= 1.7
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 1.6 KM, AZ= -38 DEG; ERHMIN= 0.3 KM; ELLIPSE AREA= 1.6 SQ KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCT 66.9 231 P 04:46:10.90 ( 0.0 ) S 04:46:19.00 (-0.2 )
DCT 80.5 202 P :12.75 (-0.3 ) S :22.70 (-0.2 )
RHT 101.9 225 P :16.00 (-0.4 ) S :29.00 ( 0.4 )
TVG 186.6 217 P :30.00 ( 0.5 ) S :52.10 ( 0.7 )
***** 11 DECEMBER 1985; 11:43 - MACON COUNTY, NORTH CAROLINA *****
*TEIC This location is considered to be unreliable
*TEIC OT= 11:43:59.8 LAT= 35.133N LON= 83.143W DEP= 7.1 KM MDB= 1.8
NO= 4, GAP= 215 DEG, RMS RES= 0.1 SEC, Q= C, SQD= A/D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RBNC 28.7 30 ePd 11:44:04.71 ( 0.1 ) eS 11:44:07.96 (-0.1 )
WSSR 42.7 292 eP :08.20 ( 1.2X) eS :12.30 ( 0.1 )
BBG 67.4 245 eS :19.20 (-0.1 )
***** 13 DECEMBER 1985; 05:09 - RICHARD B. RUSSELL RESERVOIR, SC *****
*NOTE This event appears to be reservoir related
*TEIC OT= 05:09:41.9 LAT= 34.425N LON= 82.757W DEP= 11.6 KM MDB= 1.8
NO= 18, GAP= 153 DEG, RMS RES= 0.4 SEC, Q= C, SQD= C/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 2.2 KM; ERZ= 4.1 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
LDV 31.2 167 P 05:09:47.85 ( 0.2 ) S 05:09:51.85 ( 0.1 )
BEV 37.3 177 P :48.70 ( 0.1 ) S :53.00 (-0.5 )
CH6 64.3 160 P :50.00 (-2.9X) S :56.00 (-5.0X)
BBG 108.8 297 eP :58.40 (-1.7X) eS :10:11.10 (-2.3X)
WSSR 120.8 322 eP :10:00.60 (-1.3X) eS :14.60 (-1.9X)
TKL 165.4 326 eP :09.10 ( 0.5 ) eS :29.35 ( 1.3X)
DCT 167.6 295 P :09.10 ( 0.2 ) S :28.00 (-0.7 )
LMTN 172.9 340 eP :09.50 (-0.3 ) eS :30.65 ( 0.6X)
GMG 182.2 285 eP :11.80 ( 0.5 ) eS :32.60 (-0.1 )
ETT 184.7 303 eP :12.38 ( 0.8X)
GBTN 191.3 316 eP :15.20 ( 2.7X) eS :33.30 (-1.6X)
RCT 201.8 300 S :38.80 ( 1.2X)
RHT 207.6 290 S :39.20 ( 0.0 )
CRTN 220.3 333 eP :17.02 ( 0.0 ) eS :42.30 (-0.3 )
WMTN 222.5 294 eP :18.30 ( 1.0X) eS :43.40 ( 0.2 )
SLTN 231.3 14 eP :19.05 ( 0.2 ) eS :48.25 ( 2.5X)
TVG 234.1 269 S :47.00 ( 0.8 )
LKGA 250.4 275 eP :21.35 ( 0.0 ) eS :50.00 (-0.2 )
***** 17 DECEMBER 1985; 09:04 - LOUISVILLE, TENNESSEE *****
*TEIC OT= 09:04:39.8 LAT= 35.776N LON= 84.051W DEP= 15.4 KM MDB= 0.1
NO= 7, GAP= 187 DEG, RMS RES= 0.1 SEC, Q= C, SQD= A/D
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.7 KM; ERZ= 1.2 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 18.9 230 eP 09:04:43.80 (-0.1 ) eS 09:04:46.90 ( 0.1 )
HPK 22.8 43 eS :47.80 ( 0.0 )
ORT 27.3 303 eP :45.10 ( 0.1 ) iS :48.88 ( 0.0 )
CRTN 50.7 22 eP :48.65 ( 0.1 ) eS :54.78 (-0.2 )
LMTN 59.4 78 eS :59.60 ( 2.3X)
***** 18 DECEMBER 1985; 12:23 - BACON GAP, TENNESSEE *****
*TEIC OT= 12:23:29.4 LAT= 35.834N LON= 84.604W DEP= 25.6 KM MDB= 2.1
NO= 25, GAP= 56 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 0.5 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ORT 28.2 73 eP 12:23:35.60 ( 0.0 ) iS 12:23:40.07 ( 0.0 )
BHT 30.9 273 ePd :35.89 ( 0.1 ) eS :40.50 ( 0.0 )
GBTN 40.1 118 eP :36.80 (-0.3 ) eS :42.70 ( 0.0 )
ETT 58.0 167 eP :39.50 (-0.1 ) eS :46.92 (-0.1 )
WMTN 73.2 207 eP :41.80 (-0.1 ) eS :50.84 (-0.1 )
ONTN 73.3 11 eP :41.76 (-0.1 ) eS :50.76 (-0.1 )
TKL 77.6 105 eP :42.60 ( 0.1 ) eS :52.26 ( 0.2 )
CRTN 79.9 59 ePd :42.86 ( 0.0 )
CPO 91.5 253 ePc :44.54 ( 0.0 ) eS :55.35 (-0.3 )
LMTN 108.1 87 eP :49.00 ( 1.9X) eS :24:00.49 ( 0.5X)
WSSR 111.6 124 eP :47.60 ( 0.1 ) eS :00.40 (-0.2 )
BBG 128.6 146 eP :50.20 ( 0.1 ) eS :06.40 ( 1.3X)
PDTN 128.9 241 eP :50.31 ( 0.0 ) eS :05.68 ( 0.2 )
ABTN 136.0 272 eP :51.53 ( 0.2 ) eS :07.53 ( 0.1 )
SSKY 150.9 315 eP :53.52 (-0.1 ) eS :11.87 ( 0.5X)
***** 19 DECEMBER 1985; 03:02 - JACKSON COUNTY, ALABAMA *****
*TEIC This event is considered to be a blast
*TEIC OT= 03:02:49.7 LAT= 34.903N LON= 85.682W DEP= 6.2 KM MDB= 1.5
NO= 15, GAP= 147 DEG, RMS RES= 0.2 SEC, Q= B, SQD= A/C
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.5 KM; ERZ= 1.0 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCG 31.5 75 eP 03:02:55.00 (-0.2 ) eS 03:02:59.40 ( 0.2 )
LKGA 36.5 148 eP :56.50 ( 0.3 ) eS :00.84 (-0.1 )
PDTN 43.8 340 iPc :57.18 (-0.1 ) iS :02.81 ( 0.1 )
WMTN 75.1 59 eP :03:02.25 (-0.1 )
CPO 77.4 8 eP :03.20 ( 0.5X) eS :12.24 ( 0.0 )
GMG 92.5 93 eS :17.10 ( 0.7X)
ABTN 115.7 340 eP :08.79 (-0.1 ) eS :23.21 ( 0.2 )
SHTN 145.6 295 eP :13.52 ( 0.0 ) eS :30.93 ( 0.0 )
GBTN 158.3 58 eS :34.00 (-0.3 )
BBG 171.0 91 eS :37.30 ( 0.0 )
WSSR 196.3 78 eS :44.30 ( 0.3 )
CRTN 220.3 49 eP :25.62 ( 0.7X) eS :54.61 ( 4.0X)
***** 20 DECEMBER 1985; 15:15 - BEAVER DALE, GEORGIA *****
*TEIC OT= 15:15:06.3 LAT= 34.915N LON= 84.770W DEP= 10.3 KM MDB= 2.6
NO= 31, GAP= 121 DEG, RMS RES= 0.1 SEC, Q= B, SQD= A/B
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 0.4 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GMG 10.8 123 eP 15:15:08.80 ( 0.2 )
RHT 20.8 330 P :10.23 ( 0.0 ) S 15:15:13.08 ( 0.0 )
DCT 35.5 64 P :12.49 ( 0.0 ) S :16.56 (-0.5 )
WMTN 41.3 333 iPc :13.46 ( 0.0 )
RCT 48.7 12 P :14.57 (-0.1 ) S :20.43 (-0.4 )
RCG 53.3 277 eP :15.30 (-0.1 ) eS :21.00 (-1.1X)
ETT 53.9 32 iP :15.39 (-0.1 )
LKGA 72.0 243 iPd :18.54 (-0.1 )
BBG 87.8 93 eP :20.70 (-0.1 ) iS :31.40 ( 0.0 )
GBTN 97.6 31 eP :22.00 (-0.5X) iS :33.70 (-0.7X)
BHT 104.6 351 eP :23.69 ( 0.2 ) eS :36.06 ( 0.0 )
CPO 104.8 316 ePc :23.79 ( 0.2 )
PDTN 106.2 292 ePc :23.88 ( 0.1 ) eS :36.51 (-0.1 )
ORT 118.1 21 eP :25.66 ( 0.0 ) eS :39.73 ( 0.0 )
TKL 122.4 48 eP :26.35 ( 0.1 ) eS :40.78 (-0.2 )
ANTN 145.6 343 eP :30.00 ( 0.2 )
ABTN 162.4 312 ePc :32.90 ( 0.5 )
CRTN 165.5 31 eP :32.85 ( 0.0 ) eS :53.42 ( 1.1X)
RBNC 169.9 73 eP :33.82 ( 0.5X) eS :53.29 ( 0.2 )
MSAL 174.2 267 eP :34.23 ( 0.0 ) eS :55.34 ( 0.7X)
ONTN 176.3 10 eP :34.33 (-0.2 ) eS :55.54 ( 0.4 )
RICH 209.3 58 eP :40.20 ( 0.7X) eS :16:06.20 ( 2.4X)
CCVA 212.1 28 eP :40.61 ( 0.6X) eS :06.71 ( 2.1X)
SMTN 217.2 41 eP :41.22 ( 0.5X)
SHTN 223.2 286 eP :41.81 ( 0.1 ) eS :08.51 ( 0.9X)
TRYN 233.4 80 eP :44.01 ( 0.8X)
PWLA 301.2 271 eP :51.80 (-0.1 ) iS :28.50 ( 3.3X)
PLVA 379.7 59 eP :16:00.90 (-0.4X) eS :41.30 (-0.2X)
-----
*GIT OT= 15:15:06.6 LAT= 34.928N LON= 84.758W DEP= 9.3 KM MDB= 2.9
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.1 KM, AZ= -13 DEG; ERHMIN= 0.1 KM; ELLIPSE AREA= 0.0 SQ KM)
3 Stations Used (NO= 6): RHT (Dmin= 20.2 km), DCT, and RCT
See TEIC listing for arrival time data
***** 21 DECEMBER 1985; 10:12 - RICHMOND, VIRGINIA *****
*VTSO Felt locally in Richmond, Virginia
*VTSO OT=10:12:04.9 LAT=37.684N LON=77.511W DEP=0.5 KM, FXD mb(Lg)= 2.6
MDB= 2.1
NO= 16, GAP= 169 DEG, RMS RES= 0.1 SEC, Q= C, SQD= C/C
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM HYPOELLIPSE)
(ERHMAX= 0.4 KM, AZ= -76 DEG; ERHMIN= 0.3 KM; ERZ= 48.6 KM; Q= D)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
NA5 41.4 331 iPd 10:12:11.86 ( 0.1 ) S 10:12:16.74 ( 0.0 )
NA12 46.4 316 iPd :12.70 ( 0.1 ) S :18.14 ( 0.0 )
NA2 53.4 337 eP :13.67 ( 0.0 ) iS :19.88 (-0.2 )
GHV 53.9 283 iPd :13.85 ( 0.1 ) S? :20.16 (-0.1 )
CNV 59.1 12 iPd :14.58 (-0.1 ) S? :21.64 (-0.1 )
PBV 77.8 181 eP :17.87 ( 0.1 ) S? :26.98 (-0.1 )
CVV 89.9 292 P :19.90 ( 0.2 ) S :30.60 ( 0.1 )
FRV 92.1 235 eP :20.00 (-0.1 ) S? :30.82 (-0.3 )
***** 22 DECEMBER 1985; 00:56 - WEAR COVE, TENNESSEE *****
*TEIC Felt in Gatlinburg, Tennessee (windows shaking) and also Wallerd,
Seamore, Townsend, Six Mile, and Wildwood, Tennessee
*TEIC OT= 00:56:05.0 LAT= 35.701N LON= 83.720W DEP= 13.4 KM MDB= 3.3
NO= 39, GAP= 45 DEG, RMS RES= 0.2 SEC, Q= A, SQD= A/A
ERROR ESTIMATES (DERIVED FROM HYPO71)
(ERH= 0.3 KM; ERZ= 0.4 KM)
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TKL 6.8 226 iP 00:56:07.50 ( 0.0 )
LRKT 21.4 250 iPd :09.40 ( 0.3 )
HPK 28.8 330 iPc :10.40 ( 0.1 ) iS 00:56:14.20 (-0.1 )
LMTN 35.1 54 iPd :10.90 (-0.4 )
GBTN 44.5 265 iPc :12.70 (-0.1 ) eS :18.20 (-0.3 )
WSSR 48.6 165 iPc :13.30 ( 0.0 )
CRTN 56.5 349 iPc :14.47 (-0.2 ) iS :20.60 (-1.2X)
ORT 57.7 294 iPc :14.97 ( 0.1 ) iS :22.02 (-0.1 )
CBT 65.9 254 P :16.15 ( 0.0 ) S :24.30 ( 0.0 )
RBNC 76.8 120 ePc :17.73 ( 0.2 )
ETT 78.5 238 iPd :17.92 (-0.2 )
RICH 85.0 73 iPc :18.80 (-0.2 )
SMTN 89.9 33 iPd :19.79 ( 0.0 )
BBG 92.1 185 iPd :20.00 ( 0.0 ) eS :30.90 (-0.1 )
RCT 94.0 245 P :20.54 ( 0.1 ) S :31.80 ( 0.0 )
DCT 95.8 222 P :20.73 ( 0.0 )
CCVA 100.2 3 eP :21.51 ( 0.1 )
ONTN 108.4 323 iPc :22.75 ( 0.1 ) iS :36.17 ( 0.7X)
BHT 111.9 278 ePc :23.93 ( 0.8X)
WMTN 124.3 246 eP :25.02 (-0.1 )
RHT 126.1 237 P :25.48 ( 0.1 ) S :40.64 ( 0.3 )
GMG 126.9 223 eP- :25.10 (-0.3 ) eS :41.50 ( 1.2X)
BRBC 129.9 88 ePc :26.32 ( 0.6X)
CHTN 133.2 43 eP :26.44 ( 0.0 )
ANTN 146.1 291 iPc :28.58 ( 0.2 )
SLTN 166.0 60 eP :31.59 ( 0.3 )
CPO 168.1 266 eP :32.05 ( 0.3 ) eS :51.80 ( 0.5 )
RCG 168.5 241 eP- :31.90 ( 0.0 ) eS :54.80 ( 3.3X)
BENN 187.2 95 eP :35.22 ( 0.6X) eS :57.50 ( 1.2X)
PDTN 198.9 256 eP :36.67 ( 0.1 )
LKGA 199.3 233 eP :36.35 (-0.4 ) eS :57:01.00 ( 1.0X)
TVG 205.9 225 P :39.00 ( 1.4X)
ABTN 216.9 275 ePc :39.42 ( 0.1 )
PKNC 234.5 81 eP :41.51 (-0.4 )
PLVA 254.0 65 eP- :43.90 (-0.4 )
*TEIC Following are a list of origin times for aftershocks to this
event that were too small to reliably locate
Date Origin Time
851222 01:06
851222 01:43
851225 08:19
851227 16:22
851228 04:10
-----
*GIT OT= 00:56:05.1 LAT= 35.748N LON= 83.759W DEP= 23.5 KM MDB= 3.1
ERROR ELLIPSE PROJECTED SEMI-AXES (DERIVED FROM LOCA)
(ERHMAX= 0.5 KM, AZ= -60 DEG; ERHMIN= 0.2 KM; ELLIPSE AREA= 0.3 SQ KM)
7 Stations Used (NO= 12): HPK (Dmin= 22.6 km), GBTN, CBT, RCT, DCT,
RHT, and TVG
See TEIC listing for arrival time data
Additional Data: Operator - SRL (MD= 2.1)
STA PHASE ARRIVAL TIME PHASE ARRIVAL TIME
SRPN iPu 00:56:57.05 S 00:57:35.25
SRPD iPu :58.60 S :38.20
LISTING OF HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
RESERVOIR ACTIVITY (M ge 1.0): JULY THROUGH DECEMBER 1985
Following is a listing of hypocenters and arrival times for earthquakes in
the vicinity of the Monticello Reservoir and Lake Jocasse, South Carolina,
during the second half of 1985 (MDL ge 1.0). These locations were submitted by
the University of South Carolina and were determined using arrival times from
their local network and the HYPO71 location program. Most of the entries in
the following listing are defined in Appendix A.
***** MONTICELLO RESERVOIR, SOUTH CAROLINA *****
Date Origin Lat-N Lon-W Dep MDL NO Gap RMS ERH ERZ Q SQD
850701 155506.1 34.329 81.338 1.5 1.1 9 137 0.0 0.2 0.7 B A/C
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MR01 3.9 85 Pu S-P 0.58 sec ( 0.0)
MR07 4.8 15 Pd 15:55:07.00 ( 0.0) S 15:55:07.69 ( 0.0)
MR6A 5.5 143 Pd :07.09 ( 0.0) S :07.86 ( 0.0)
JSC 9.0 127 Pd :07.64 ( 0.0) S :08.87 ( 0.0)
MR03 11.2 283 Pu S-P 1.50 sec ( 0.0)
MR02 18.0 146 Pd S-P 2.52 sec ( 0.1)
Date Origin Lat-N Lon-W Dep MDL NO Gap RMS ERH ERZ Q SQD
850706 034512.4 34.343 81.319 1.9 1.2 6 183 0.0 0.6 0.9 C A/D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MR07 3.1 349 Pu 03:45:12.95 (-0.1) S 03:45:13.56 ( 0.0)
MR6A 6.2 166 Pu :13.50 ( 0.0) S :14.35 ( 0.0)
JSC 8.8 142 Pu :13.88 ( 0.0) S :15.11 ( 0.0)
***** LAKE JOCASSEE, SOUTH CAROLINA *****
Date Origin Lat-N Lon-W Dep MDL NO Gap RMS ERH ERZ Q SQD
850730 113839.6 34.995 82.961 2.6 1.1 6 202 0.0 0.1 0.1 C A/D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BG3 2.7 95 Pu 11:38:40.22 ( 0.0) S 11:38:40.68 ( 0.0)
LPM 6.0 253 Pd :40.68 ( 0.0) S :41.50 ( 0.0)
SMT 7.2 187 Pd :40.88 ( 0.0) S :41.80 ( 0.0)
NOTE: The following event also appears in the tectonic earthquake listing
Date Origin Lat-N Lon-W Dep MDL NO Gap RMS ERH ERZ Q SQD
851018 014529.8 35.084 82.980 2.2 1.8 6 317 0.0 0.0 0.2 C A/D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BG3 11.0 156 Pu 01:45:31.70 ( 0.0) S 01:45:33.06 ( 0.0)
LPM 12.3 199 Pd :31.91 ( 0.0) S :33.42 ( 0.0)
SMT 17.0 177 Pu :32.67 ( 0.0) S :34.72 ( 0.0)
ADDITIONAL ARRIVAL TIME DATA:
JUNE THROUGH DECEMBER 1985
DATE= 850622, Operator: SRL (MD= 2.9)
STATION PHASE ARRIVAL TIME PHASE ARRIVAL TIME
SRPD iPu 13:26:35.05 S 13:27:03.15
SRPW iPu :37.25 iS :04.70
SRPN iP :39.10 S :09.65
DATE= 851019, Operator: DGS
Remark: Foreshock, New York City area
STATION PHASE ARRIVAL TIME PHASE ARRIVAL TIME
BVD eP? 10:06:18.0 eS? 10:06:41.5
BWD eP? :18.0 eS? :42.0
DATE= 851019, Operator: DGS
Remark: New York City area, MDB= 3.8 (Avg Duration = 297 sec)
STATION PHASE ARRIVAL TIME
BVD iPc 10:08:12.05
BWD iPc :12.55
NED iPc :14.75
BBD iP? :18.55
DATE= 851021, Operator: DGS
Remark: Aftershock, New York City area, MDB= 2.8
STATION PHASE ARRIVAL TIME PHASE ARRIVAL TIME
BVD iP 10:42:45.8 S 10:43:09.3
BWD iPc :46.5 S :11.3
NED iP :49.1 S :16.3
DATE= 851129, Operator: SRL
STATION PHASE ARRIVAL TIME PHASE ARRIVAL TIME
SRPN Pu 04:52:45.7 S 04:53:05.85
DATE= 851225, Operator: DGS
Remark: Long Island, New York (?)
STATION PHASE ARRIVAL TIME PHASE ARRIVAL TIME
BVD iP 10:18:29.5 eS? 10:18:53.5
BWD eP? :31.3 iS :19:00.0
DESCRIPTION OF APPENDICES
Appendix A contains definitions of most entries found in this Bulletin.
Also given is a detailed listing of agencies or groups (and their letter codes)
that supply information to this Bulletin.
Appendix B is an alphabetical listing of the 147 stations of the
Southeastern United States Seismic Network (SEUSSN) operating during the period
from July through December, 1985 (network changes are found at the end of the
listing). Bulletin 11 contained a complete Station Information Appendix that
gave detailed information on the operators, type of seismographs, response
characteristics, recording formats, etc. Subsequent bulletins have presented
only changes in the network. Figure 6 is a geographic map showing the SEUSSN.
The SEUSSN monitoring area is considered to include all of Florida, Georgia,
Alabama, South Carolina, North Carolina, Virginia, West Virginia (south of
latitude 37.72 deg N), Maryland, and Delaware; and includes Tennessee and
Kentucky - east of longitude 87 degrees West (see outlined area in Figure 6).
Figures 7, 8, 9, 10 and 11 show individual networks (with station
identification codes) operated by major member agencies or groups of the
SEUSSN.
Appendix C gives Errata and Addenda as necessary to correct/update
previous Bulletins.
Appendix D gives a brief description of the method and results of network
calibration of the digital recording system at the VTSO.
Appendix E contains results from a study of traveltime residuals for
events within the VTSO seismic network.
Appendix A. Definitions and Operator Listing
Some entries in this Bulletin that might require definition are:
AZM: Azimuthal angle from epicenter to station as measured from
north (in deg),
DEP: Focal depth estimate (in km); FXD indicates that the depth was
held fixed during the epicentral determination,
DIST (KM): Epicentral distance (in km) between the epicenter and a
station,
ERROR ELLIPSE: Semi-axes, expressed as lengths (km) and azimuths (deg), of the
vertical projection of the error ellipsoid (Lahr, 1980).
Horizontal axes are expressed as the semi-major axis (ERHMAX),
it's azimuth (AZ), and the semi-minor axis (ERHMIN). The
vertical axis (ERZ) is the largest vertical deviation of the
error ellipsoid from the hypocenter. A quality measure (Q) for
the ellipsoid based on the length of the largest semi-axis
(ERHMAX, ERHMIN, or ERZ) may also be supplied,
GAP: The largest azimuthal separation (in deg) between recording
stations,
LOCA: Computer hypocenter location program developed at the Georgia
Institute of Technology,
MBN or mb(Lg): Body wave magnitude determination using Nuttli's formulas for
the Lg phase (Nuttli, 1973),
MDB, MDL, MD: Duration/coda length magnitude that approximates either the mb,
ML, or an unknown magnitude scale, respectively; see SEUSSN
Bulletin 17, page 1, or contact the agency or group making the
estimate for details on their specific procedure,
MEUS: Body wave magnitude determination using Evernden's formulas for
the Pn phase (Evernden, 1967),
ML: Local magnitude; contact the agency or group making the
estimate for details on their specific procedure,
NO: Number of P, S, and S-P readings used in locating the event,
PHASE: Phase descriptions for either P or S waves, or S-P times.
Included under this heading may also be the descriptors; 'i'
for an impulsive arrival or 'e' for an emergent arrival.
Preliminary first motions may also be given for P wave
polarities. These include; 'u', 'c', or '+' for a
compressional first arrival, and 'd' or '-' for a dilatational
first arrival.
Q: Solution quality of the hypocenter (the average of the SQD
quality measures; Lee and Lahr, 1974),
RES: Arrival time residual (the difference between the observed and
the calculated arrival time, in seconds). An "X" following the
value of the arrival time residual means that the arrival time
was not used to compute the location of that event,
RMS: Root-mean-square of the weighted arrival time residuals (in
sec),
S-P: Difference between the S and P wave arrival times (in sec),
SQD: Measures of the statistical quality of the solution (S), and of
the distribution of stations (D) around the hypocenter (Lee and
Lahr, 1974),
*XXXX: Code indicating the agency or group that made the
hypocentral/magnitude determination; a listing of agencies and
groups that operate seismographs in the SEUSSN and/or who
supply information to this BULLETIN follows.
OPERATOR CODES
BCC - Baptist College at Charleston, SC
CPL - Carolina Power and Light Company, NC
DGS - Delaware Geological Survey, DE
DUP - E. I. DuPont de Nemours and Company, Inc., SC
GIT - Georgia Institute of Technology, GA
GSA - Geological Survey of Alabama, AL
GSW - Georgia Southwestern College, GA
NASA - National Aeronautics and Space Administration/
Goddard Space Flight Center, WV
NEIC - National Earthquake Information Center, USGS, CO
SCEG - South Carolina Electric and Gas Company, SC
SLU - St. Louis University, MO
SRL - Savannah River Labs, SC
TCC - Tidewater Community College, VA
TEIC - Tennessee Earthquake Information Center, TN
TVA - Tennessee Valley Authority, TN
UFL - University of Florida, FL
UNC - University of North Carolina, NC
USC - University of South Carolina, SC
USGS - United States Geological Survey, CO
UTM - University of Tennessee at Martin, TN
VDMR - Virginia Division of Mineral Resources, VA
VPC - Virginia Power Company, VA
VTSO - Virginia Tech Seismological Observatory, VA
VSCC - Volunteer State Community College, TN
WAL - Washington and Lee University, VA
WVU - West Virginia University, WV
Appendix B. Seismic Stations Operating During Report Period
Stations operating in the SEUSSN during the report period are listed below. A
listing of operator codes with their definition may be found at the end of
Appendix A. Changes to the network (new stations, stations that have been
closed, etc.) may be found at the end of the station listing.
Sta. Lat. Long. Elev.
Code (Deg-N) (Deg-W) (M) Locality Operator
ABTN 35.886 86.109 363 Auburntown, TN TVA
AMG 32.0594 84.2177 122 Americus, GA GSW
ANTN 36.1717 85.2313 612 Anderson, TN TVA
ATL 33.4333 84.3375 272 Atlanta, GA GIT
BAV 37.2220 80.4250 622 Blacksburg, VA VTSO
BBD 39.3461 75.6767 18 Blackbird, DE DGS
BBG 34.874 83.811 1355 Brasstown Bald, GA TEIC
BCS 32.9812 80.0717 5 Baptist College, SC BCC-USGS
BENN 35.565 81.661 878 Benn Knob, NC TEIC
BEV 34.0893 82.7333 158 Clark Hill Reservoir, GA GIT
BFMT 35.488 84.227 329 Birch Field Mtn, TN TEIC
BGKY 37.006 86.523 240 Bowling Green, KY TVA
BHT 35.847 84.945 826 Blowhole, TN TEIC
BKA 33.6338 87.9690 122 Kennedy, AL GIT-GSA
BKHT 35.532 83.936 843 Bunker Hill, TN TEIC
BLA 37.2113 80.4202 634 Blacksburg, VA VTSO
BRBC 35.739 82.286 1976 Mt. Mitchell, NC TEIC
BSPT 35.726 84.109 334 Big Springs, TN TEIC
BVD 39.7749 75.4993 58 Bellevue State Park, DE DGS
BV1 38.1780 79.6612 768 Burnsville, VA VPC-VTSO
BV2 38.1367 79.9195 610 Mountain Grove, VA VPC-VTSO
BV3 38.2383 79.7667 750 Lightner, VA VPC-VTSO
BV4 38.3572 79.8278 814 Dunsmore, WV VPC-VTSO
BWD 39.7994 75.5767 63 Brandywine State Park, DE DGS
CBN 38.2050 77.3733 70 Corbin, VA USGS
CBT 35.5393 84.4207 357 Christianburg, TN GIT
CCRT 35.466 84.054 940 Cow Camps Ridge, TN TEIC
CCS 32.8162 80.2553 3 Cawcaw Swamp, SC BCC-USGS
CCVA 36.603 83.667 509 Cudjo Cave, VA TEIC
CDG 34.6108 84.6667 333 Carters Dam, GA GIT
CEH 35.8908 79.0928 152 Chapel Hill, NC UNC
CHF 34.0247 82.5867 152 Calhoun Falls, SC GIT
CHTN 36.5847 82.7200 558 Church Hills, TN TVA
CH5 33.7332 82.3118 114 Clark Hill Reservoir, GA GIT
CH6 33.8938 82.5291 130 Clark Hill Reservoir, GA GIT
CNV 38.2050 77.3733 70 Corbin, VA VTSO
COTN 35.7842 86.9707 320 Columbia, TN TVA
COW 33.3842 80.7008 33 Cow Castle Creek, SC USC-USGS
CPO5 35.604 85.574 570 Cumberland Plateau, TN TVA
CRG 34.6589 84.5822 422 Carters Dam, GA GIT
CRTN 36.200 83.841 488 Comb Ridge, TN TVA
CSPT 35.761 83.824 335 Cold Spring, TN TEIC
CVL 37.9813 78.4608 167 Charlottesville, VA VTSO
CVV 37.9813 78.4608 167 Charlottesville, VA VDMR
DCT 35.0542 84.4194 508 Ducktown, TN GIT
DRC 33.100 80.392 10 Dorchester, SC BCC-USGS
EP1 33.9514 82.5136 134 Clark Hill Reservoir, GA GIT
ETT 35.326 84.455 588 Etowah, TN TEIC
FRV 37.2030 78.3593 216 Farmville, VA VTSO
GAI 29.6458 82.3393 51 Gainesville, FL UFL
GBTN 35.666 84.211 326 Greenback, TN TEIC
GBV 38.4321 79.8453 802 Green Bank, WV NASA
GFM 36.111 81.807 1726 Grandfather Mountain, NC TEIC
GHV 37.7942 78.1073 107 Goochland, VA VTSO
GLT 36.362 86.498 159 Gallatin, TN TEIC-VCSS
GMG 34.860 84.670 1097 Grassy Mountain, GA TEIC
GTD 38.7414 75.4144 15 Georgetown, DE DGS
HBF 32.9330 80.3780 10 Harts Bluff, SC USC-USGS
HGA 34.2602 85.8463 384 Collinsville, AL GIT-GSA
HPK 35.926 83.879 305 Knoxville, TN GIT-TVA
HVA 34.0264 86.7692 195 Hanceville, AL GIT-GSA
HWD 32.742 80.287 3 Hollywood, SC BCC-USGS
HWV 37.5905 80.8408 521 Hinton, WV VTSO
IVA 34.2721 82.7460 168 Clark Hill Reservoir, GA GIT
JSC 34.2790 81.2580 120 Jenkinsville, SC USC-USGS
LCAL 34.5225 85.6302 544 Lambert Chapel, AL TVA
LDV 34.1478 82.6833 162 Clark Hill Reservoir, GA GIT
LEX 37.7893 79.4417 311 Lexington, VA WAL
LHS 34.4790 80.8080 120 Liberty Hill, SC USC-USGS
LMTN 35.8868 83.4098 610 Little Mountain, TN TVA
LRKT 35.634 83.924 780 Look Rock, TN TEIC
MGS 32.8970 80.1408 3 Middleton Gardens, SC BCC-USGS
MLA 32.7055 87.6937 55 Sawyerville, AL GIT-GSA
MOTN 36.618 87.987 177 Model, TN TVA
MRG 39.6330 79.9544 281 Morgantown, WV WVU
MR01 34.3318 81.2957 131 Monticello Reservoir, SC USC
MR02 34.1930 81.2302 84 Monticello Reservoir, SC USC
MR03 34.3515 81.4568 125 Monticello Reservoir, SC USC
MR04 34.4287 81.2165 145 Monticello Reservoir, SC USC
MR05 34.2675 81.3342 145 Monticello Reservoir, SC USC
MR07 34.3705 81.3250 145 Monticello Reservoir, SC USC
MR08 34.4088 81.4092 145 Monticello Reservoir, SC USC
MR10 34.3363 81.3375 145 Monticello Reservoir, SC USC
MR6A 34.2887 81.3025 145 Monticello Reservoir, SC USC
MR9A 34.2873 81.3292 145 Monticello Reservoir, SC USC
MSAL 34.8467 86.6735 260 Monte Sano, AL TVA
MTT 33.7513 81.6362 150 Monetta, SC USC-USGS
NATN 35.865 88.240 198 Natchez Trace State Park, TN TVA
NAV 37.3157 80.7935 610 Narrows, VA VTSO
NA2 38.1270 77.7470 82 North Anna, VA VTSO
NA5 38.0109 77.7365 76 North Anna, VA VTSO
NA11 37.9867 77.6830 85 North Anna, VA VTSO
NA12 37.9830 77.8795 125 North Anna, VA VTSO
NED 39.7042 75.7082 46 Newark, DE DGS
OCA 34.6138 86.4352 250 Owens Crossroads, AL GIT-GSA
ONTN 36.4815 84.4433 635 Oneida, TN TVA
ORT 35.9095 84.3048 370 Oak Ridge, TN TVA
OSB 33.5472 80.8444 80 Orangeburg, SC USC-USGS
PBF 32.8628 79.7607 -68 Porcher Bluff, SC BCC-USGS
PBS 33.2790 80.2640 25 Pigeon Bay, SC USC-USGS
PBV 36.9823 77.5312 49 Petersburg, VA VTSO
PDTN 35.273 85.850 335 Piedmont, TN TVA
PKNC 36.046 81.158 785 Pores Knob, NC TEIC
PLVA 36.666 81.161 1353 Point Lookout, VA TEIC
PRM 34.0833 82.3633 170 Parsons Mountain, SC USC-USGS
PUV 37.0235 80.8158 652 Pulaski, VA VTSO
PWLA 34.980 88.064 204 Pickwick Lake, AL TEIC
PWV 37.3348 81.0488 820 Princeton, WV VTSO
RBNC 35.357 82.986 1829 Richland Balsam, NC TEIC
RCG 34.975 85.348 468 Rock City, GA TEIC
RCT 35.3453 84.6613 265 Riceville, TN GIT
RHT 35.0781 84.8825 299 Red Hill, TN GIT
RICH 35.920 82.820 967 Rich Mountain, NC TEIC
RMG 34.3359 85.3160 337 Rocky Mountain Net, GA GIT
RNC 35.6320 78.9803 86 Raleigh, NC CPL
RNC2 35.5547 78.9897 75 Raleigh, NC CPL
RNC3 35.5933 78.9045 95 Raleigh, NC CPL
RNC4 35.6658 78.9045 93 Raleigh, NC CPL
SBK 32.5672 80.1802 -68 Seabrook, SC BCC-USGS
SGS 33.1930 80.5120 25 St George, SC USC-USGS
SHTN 35.460 87.130 323 Sandy Hook, TN TVA
SLTN 36.443 82.121 1280 Sullivan County, TN TVA
SMG 34.3495 85.3463 314 Rocky Mountain Net, GA GIT
SMTN 36.382 83.182 768 Short Mountain, TN TEIC
SRPD 33.1550 81.7125 31 Savannah River Lab, SC DUP-SRL
SRPN 33.3290 81.5888 95 Savannah River Lab, SC DUP-SRL
SRPW 33.2023 81.5782 77 Savannah River Lab, SC DUP-SRL
SSKY 36.7955 85.7925 300 Summer Shade, KY TVA
SVS 32.9688 80.2487 3 Slandsville, SC BCC-USGS
SWTN 35.3002 86.0762 305 Sewanee, TN TVA
TDA 33.5417 86.0247 181 Talladega, AL GIT-GSA
TKL 35.658 83.774 350 Tuckaleechee Caverns, TN TEIC-TVA
TLT 35.3012 84.2833 512 Tellico Plains, TN GIT
TRK 33.1222 79.7778 10 Turkey Creek, SC USC-USGS
TRYN 35.246 82.267 915 Tryon Peak, NC TEIC
TSA 33.2562 87.0675 180 Tannehill State Park, AL GIT-GSA
TVG 34.3772 85.3023 323 Rocky Mountain Net, GA GIT
UGRT 35.611 84.117 302 Union Grove, TN TEIC
VBV 36.7853 76.1080 5 Virginia Beach, VA TCC
VEW 32.7177 79.9415 -68 Oceanview, SC USC-USGS
VRN 33.0375 80.9417 30 Varneville, SC USC-USGS
VWV 37.4660 80.3917 963 VA-WVA Border VTSO
WAS 32.908 80.263 3 West Ashley, SC BCC-USGS
WMTN 35.248 84.973 378 White Oak Mountain, TN TVA
WMV 37.1085 80.9705 1157 Walker Mountain, VA VTSO
WSSR 35.270 83.570 1390 Wesser Bald, NC TEIC
ZIN 33.1072 80.1628 10 Mt Zion Church, SC BCC-USGS
CHANGES TO THE SEUSSN STATION LISTING
Sta.
Code Locality Operator Change
COTN Columbia, TN TVA Closed
GMG Grassy Mountain, GA TEIC Opened
SBK Seabrook, SC BCC-USGS Closed
SWTN Sewanee, TN TVA Closed
WSSR Wesser Bald, NC TEIC Opened
FIGURE 6. Seismic Stations (Open Triangles) Operating in the SEUSSN from July
through December 1985. The SEUSSN monitoring area is outlined.
FIGURE 7. Georgia Tech - Geological Survey Of Alabama Seismic Network.
FIGURE 8. South Carolina Seismic Network.
FIGURE 9. Tennessee Earthquake Information Center - Southern Appalachian
Regional Seismic Network.
FIGURE 10. Tennessee Valley Authority Seismic Network.
FIGURE 11. Virginia Tech Seismic Network.
Appendix C. Errata and Addenda
Jill Rawlins of USC has informed the editors that the tectonic event of
790507 10:00 (see SEUSSN Bulletin 14A) should be associated with activity near
the Monticello Reservoir in South Carolina.
TVA, TEIC, and GIT have informed the editors that the GIT event of 850308 14:29
and the TEIC event of 850309 14:29 are the same event (see SEUSSN Bulletin 16,
pages 20-21). The correct origin time is 850309 14:29.
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