PREFACE
REVISED FORMAT AND PRINTING SCHEDULE FOR
SOUTHEASTERN U.S. SEISMIC NETWORK BULLETINS
This SEUSSN Bulletin Number 23 completes 11.5 years of biannual reporting
of seismicity for the southeastern United States covering earthquakes of all
magnitudes. Decreases in the levels of network funding necessitate the
following revisions:
1. Publication will be on an annual, rather than a biannual, schedule
2. Full reporting of arrival-times, traveltime residuals, etc. will be
continued only for shocks with M ge 2.5
3. Earthquakes with M < 2.5 will have only their hypocentral, error, and size
parameters listed
4. Network statistics will be maintained unchanged
It is hoped that the reduced reporting level and frequency will effect the
necessary economies, while still meeting user needs in an effective manner.
BULLETIN NUMBER 22
TABLE OF CONTENTS
PAGE
SOUTHEASTERN U. S. EARTHQUAKES: JULY THROUGH DECEMBER 1988................. 1
Acknowledgments............................................................ 2
References................................................................. 2
SEUSSN EARTHQUAKE CATALOG STATISTICS....................................... 7
SEUSSN Report Period/Cumulative Earthquake Catalog Statistics.............. 7
Focal Depth Distributions.................................................. 8
Completeness Estimates, Magnitude Distributions,
and Recurrence Relations................................................... 9
HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
SOUTHEASTERN U.S. EARTHQUAKES: JULY THROUGH DECEMBER 1988............... 11
HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
RESERVOIR ASSOCIATED SEISMICITY: JULY THROUGH DECEMBER 1988............. 23
Appendix A. Definitions and Operator Listing.............................. 25
Appendix B. Seismic Stations Operating During Report Period............... 27
Appendix C. Errata and Addenda............................................ 33
MAILING LIST............................................................... 35
FIGURES
1. Earthquake Epicenter Map for the Report Period........................ 3
2. Earthquake Epicenter Map for the Report Period (Scaled to Magnitude).. 4
3. Earthquake Epicenter Map for the Period from July 1977 through
December 1988....................................................... 5
4. Earthquake Epicenter Map for the Period from July 1977 through
December 1988 (Scaled to Magnitude, M ge 3.0)....................... 6
5. Focal Depth Distribution of Southeastern U.S. Earthquakes............. 8
6. Magnitude Distribution of Southeastern U.S. Earthquakes............... 9
7. Magnitude Recurrence Relation For The Southeastern U. S............... 10
8. Seismic Stations Operating During Report Period....................... 29
9. Georgia Tech - Geological Survey Of Alabama Seismic Network........... 30
10. South Carolina Seismic Network........................................ 30
11. Center for Earthquake Research and Information - Southern
Appalachian Regional Seismic Network................................ 31
12. Tennessee Valley Authority Seismic Network............................ 31
13. Virginia Tech Seismic Network......................................... 32
TABLES
1. SEUSSN Report Period/Cumulative Earthquake Catalog Statistics......... 7
2. Estimates Of Completeness For The Southeastern U. S................... 9
SOUTHEASTERN U. S. EARTHQUAKES: JULY THROUGH DECEMBER 1988
This report is considered to be incomplete for Tennessee and Georgia,
particularly for the last three months of 1988. Earthquake listings for the
entire report period were not received from the Center for Earthquake Research
and Information (Memphis State University) and the Georgia Institute of
Technology. A listing for the last three months of 1988 was not received from
the Tennessee Valley Authority. When received, these data will be published as
Addenda to future bulletins.
There were 28 earthquakes (0.0 le M le 4.6) located within the SEUSSN
monitoring area during the last six months of 1988. Of those, one in Kentucky
(7 September 02:28, mb(Lg)= 4.6, MDB= 4.5, MMI= VI), and two in Virginia (27
August 16:52, MDB= 2.7, MMI= IV; 11 December 18:56, MDB= 2.2, MMI= III), were
felt. Southeastern Tennessee continues to report the greatest number of
earthquakes within the region. Earthquakes reported include 1 in Georgia, 5 in
Kentucky, 1 in North Carolina, 3 in South Carolina, 13 in Tennessee, and 5 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 11.5 year period from July 1977 through December 1988
(SEUSSN Bulletins 1 through 23). The SEUSSN earthquake statistics section
includes general catalog statistics (page 7), focal depth distribution plots
(page 8), magnitude distribution plots (page 9), estimates of catalog
completeness (page 9), and a magnitude recurrence relation (page 10).
The largest earthquake for the report period was an mb(Lg)= 4.6 event (7
September) that was felt (epicentral MMI= VI) in eastern Kentucky and parts of
Indiana, Ohio, Tennessee, and West Virginia. This event was located within 8
km of the largest event in the SEUSSN catalog (27 July 1980, mb= 5.2). The
most recent event was immediately followed by an aftershock (mb(Lg)= 3.8) which
may also have been felt.
There were two earthquakes (M= 2.0, 2.1) associated with the Monticello,
South Carolina, reservoir during the last six months of 1988, neither of which
was felt.
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 the
SEUSSN stations map).
Acknowledgments
This report is the twenty-third semiannual BULLETIN OF SEISMICITY OF THE
SOUTHEASTERN UNITED STATES and covers the period from July through December,
1988. The organizations supplying data for this Bulletin are the Baptist
College at Charleston, Delaware Geological Survey, the E. I. DuPont de Nemours
and Company, Inc. (Savannah River Laboratory), Georgia Institute of Technology,
Memphis State University (Center for Earthquake Research and Information), 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,
Virginia Power.
References
Bollinger, G. A., Frederick C. Davison, Jr., Matthew S. Sibol, and Jeffrey B.
Birch, 1989, Magnitude recurrence relations for the southeastern United
States and its subdivisions, Journal of Geophysical Research, 94, pp.
2857-2873.
Chapman, M. C., J. A. Snoke, and G. A. Bollinger, (1988), A procedure for
calibrating short-period telemetered seismograph systems, Bulletin of the
Seismological Society of America, 78, pp. 2077-2088.
Hoaglin, David C., Frederick Mosteller, and John W. Tukey, (1983),
Understanding Robust And Exploratory Data Analysis, John Wiley & Sons, New
York, NY, 447 pp.
Lahr, J. C., (1980), HYPOELLIPSE/VAX: 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.
Lee, W. H. K., and J. C. Lahr, (1974), HYPO71: A computer program for
determining hypocenter, magnitude, and first motion pattern of local
earthquakes, U.S. 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.
Shedlock, Kaye M., (1987), Earthquakes recorded by the South Carolina Seismic
Network (1974-1986), U.S. Geological Survey Open-File Report 87-437, 92
pp.
FIGURE 1. Epicenters (Open Circles) for Earthquakes (M ge 0.0) in the
Southeastern United States from July through December 1988.
FIGURE 2. Epicenters (Open Circles - Scaled to Event Magnitude) for
Earthquakes (M ge 0.0) in the Southeastern United States from July
through December 1988.
FIGURE 3. Epicenters (Open Circles) for Earthquakes (M ge 0.0) in the
Southeastern United States from July 1977 through December 1988.
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 1988.
SEUSSN EARTHQUAKE CATALOG STATISTICS
TABLE 1
SEUSSN Report Period/Cumulative Earthquake Catalog Statistics
Period: July through December 1988 (0.5 years)
NOTE: Report period listing is not considered to be complete (see page 1)
Tectonic Reservoir
Number of Earthquakes with M ge 0.0 ......................... 28 2
Number of Earthquakes with M ge 2.5 ......................... 3 0
Number of Earthquakes with M ge 3.5 ......................... 2 0
Number of Felt Earthquakes................................... 3 0
Rate of Earthquakes with M ge 0.0 (per year)................. 56 4
Rate of Earthquakes with M ge 2.5 (per year)................. 6 0.0
Rate of Earthquakes with M ge 3.5 (per year)................. 4 0.0
Rate of Felt Earthquakes (per year).......................... 6 0.0
Mean Earthquake Magnitude.................................... 1.7 2.1
Median Earthquake Magnitude.................................. 1.6 2.1
Number of Earthquakes with Known Dmin le 5.0 km.............. 5 2
Number of Earthquakes with Known Dmin le 10.0 km............. 9 2
Number of Earthquakes with Known Dmin le 25.0 km............. 18 2
Number of Earthquakes with Known ERH le 5.0 km............... 25 2
Number of Earthquakes with Known ERZ le 5.0 km............... 24 2
Number of Blasts or Poorly Located Events Reported........... 0
Number of Events Outside the SEUSSN Area Reported............ 0
Number of Seismograph Stations Operating..................... 126
Largest Earthquake..........: 7 September 1988; 02:28 - Owingsville, KY
mb(Lg)= 4.6, MDB= 4.5, MMI= VI
Period: July 1977 through December 1988 (11.5 years)
Tectonic Reservoir
Number of Earthquakes with M ge 0.0 ......................... 833 658
Number of Earthquakes with M ge 2.5 ......................... 153 55
Number of Earthquakes with M ge 3.5 ......................... 18 2
Number of Felt Earthquakes................................... 103 10
Rate of Earthquakes with M ge 0.0 (per year)................. 72 57
Rate of Earthquakes with M ge 2.5 (per year)................. 13 4.8
Rate of Earthquakes with M ge 3.5 (per year)................. 1.6 0.2
Rate of Felt Earthquakes (per year).......................... 9.0 0.9
Mean Earthquake Magnitude.................................... 1.7 1.4
Median Earthquake Magnitude.................................. 1.6 1.4
Number of Earthquakes with Known Dmin le 5.0 km.............. 74 62
Number of Earthquakes with Known Dmin le 10.0 km............. 163 93
Number of Earthquakes with Known Dmin le 25.0 km............. 489 124
Number of Earthquakes with Known ERH le 5.0 km............... 723 155
Number of Earthquakes with Known ERZ le 5.0 km............... 609 111
Number of Blasts or Poorly Located Events Reported........... 175
Number of Events Outside the SEUSSN Area Reported............ 13
Largest Earthquake............: 27 July 1980; 18:52 - Sharpsburg, KY
mb = 5.2, MMI = VII
FIGURE 5. Focal Depth Distribution of Southeastern U.S. Earthquakes. The
upper half of the figure shows the interval (left) and cumulative
(right) depth distributions for the report period while the lower
half of the figure is a similar display for earthquakes reported
during the period from July 1977 through December 1988 (M ge 0.0,
ERZ le 5.0 km, and free depth determination). Displayed above both
interval distributions is a box plot (Hoaglin and others, 1983, pp.
58-65). Indicated are the mean (star), the 25% and 75% quartile
(box outline), the median (center bar), the upper and lower adjacent
values (small vertical bars), and outliers (small squares). On the
cumulative depth distributions arrows show the 10% and 90% depths.
COMPLETENESS ESTIMATES, MAGNITUDE DISTRIBUTIONS, AND RECURRENCE RELATIONS
TABLE 2
Completeness Estimates (Years) By Magnitude For The Southeastern
U. S. And Subregions (Source: Bollinger and Others, 1989)
MAGNITUDE.......... 2.25 2.75 3.25 3.75 4.25 4.75 5.25 5.75 6.25 6.75
Southeastern US.... 6 10 15 85 145 145 215 215 215 215
Valley & Ridge
and Blue Ridge... 9 10 20 75 110 215 215 215 215 215
Piedmont........... 10 10 115 215 215 215 215 215 215 215
Coastal Plain...... 10 10 60 145 145 215 215 215 215 215
Giles County, VA... 10 15 15 30 30 215 215 215 215 215
Central Virginia... 15 60 215 215 215 215 215 215 215 215
Eastern Tennessee.. 5 10 10 85 115 115 215 215 215 215
Charleston, SC..... 10 70 70 70 130 215 215 215 215 215
FIGURE 6. Magnitude Distributions of Southeastern U. S. Earthquakes. The left
half of the figure shows the interval magnitude distribution for the
report period while the right half of the figure shows a similar
distribution for the entire catalog. Displayed above both
distributions is a box plot (Hoaglin and others, 1983, pp. 58-65).
Indicated are the mean (star), the 25% and 75% quartile (box
outline), the median (center bar), the upper and lower adjacent
values (small vertical bars), and outliers (small squares).
FIGURE 7. Magnitude Recurrence Relation For The Southeastern U. S. The upper
half of the figure shows the seismicity map with historical
(circles) and network (X's) epicenters for the time period
1772-1986. The lower half of the figure shows a plot of Log(NI)
(interval number of earthquakes per year, m +- 0.25) versus mb(Lg)
for the southeastern U.S. The maximum likelihood line includes 95%
confidence intervals (Source: Bollinger and others, 1989).
HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
SOUTHEASTERN U. S. EARTHQUAKES: JULY THROUGH DECEMBER 1988
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.
***** 3 JULY 1988; 08:57 - ATHENS, TENNESSEE *****
*TVA OT= 08:57:30.95 LAT= 35.456N LON= 84.611W DEP= 20.7 KM MDB= 0.3
NO= 8, DMIN= 12 KM, GAP= 100 DEG, RMS= 0.11 SEC, Q= B, SQD= B/B
ERHMAX= 1.1 KM, AZ= -48 DEG; ERHMIN= 0.5 KM; ERZ= 1.1 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
TQTN 12.4 303 eP 08:57:35.85 ( 0.88X) eS 08:57:37.90 ( 0.00 )
ETT 20.2 135 eP :37.50 ( 1.70X) eS :39.50 ( 0.17 )
WMTN 40.2 235 eP :38.42 ( 0.02 ) eS :43.82 (-0.02 )
GBTN 43.2 57 eS :44.10 (-0.48 )
ORT 57.5 29 eS :48.38 ( 0.12 )
ANTN 97.2 325 eS :58.47 (-0.26 )
BBG 97.4 131 eS :53.32 (-5.56X)
ABTN 143.7 290 eS :58:11.52 ( 0.53 )
***** 3 JULY 1988; 11:28 - LOUDON, TENNESSEE *****
*TVA OT= 11:28:08.30 LAT= 35.686N LON= 84.302W DEP= 17.7 KM MDB= 0.8
NO= 15, DMIN= 9 KM, GAP= 75 DEG, RMS= 0.12 SEC, Q= A, SQD= A/A
ERHMAX= 0.4 KM, AZ= -64 DEG; ERHMIN= 0.3 KM; ERZ= 0.7 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 8.5 105 iP 11:28:11.70 ( 0.07 ) iS 11:28:14.10 ( 0.04 )
ORT 24.8 359 iP+ :13.48 ( 0.07 ) iS :16.99 (-0.15 )
ETT 42.3 199 iP :15.90 (-0.05 ) iS :21.50 (-0.03 )
TQTN 42.8 244 eP- :17.30 ( 1.30X) eS :21.40 (-0.21 )
TKL 47.9 94 eS :22.90 (-0.04 )
BHT 60.9 287 eS :26.30 (-0.15 )
CRTN 70.6 36 eP :21.00 ( 0.76X) eS :29.05 ( 0.09 )
WMTN 77.9 232 eS :31.15 ( 0.27 )
WSSR 79.8 124 eP :21.90 ( 0.18 ) eS :31.13 (-0.38 )
ANTN 99.7 303 eS :36.80 ( 0.12 )
ABTN 164.9 278 eS :54.72 ( 0.83 )
***** 6 JULY 1988; 01:58 - RUTLEDGE, TENNESSEE *****
*TVA Probable earthquake
*TVA OT= 01:58:47.85 LAT= 36.341N LON= 83.538W DEP= 12.6 KM MDB= 0.9
NO= 6, DMIN= 31 KM, GAP= 201 DEG, RMS= 0.12 SEC, Q= D, SQD= D/D
ERHMAX= 6.3 KM, AZ= -21 DEG; ERHMIN= 0.6 KM; ERZ= 5.6 KM; Q= D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 31.4 240 eP 01:58:54.03 ( 0.38 ) eS 01:58:57.83 (-0.05 )
SMTN 32.3 82 eP :54.00 ( 0.19 ) eS :58.00 (-0.16 )
BRTN 60.2 88 eS :59:05.90 ( 0.01 )
TKL 78.7 196 eS :10.85 ( 0.01 )
WSSR 118.0 182 eP :59:00.00 (-7.24X) eS :22.90 ( 1.51X)
WMTN 177.6 227 S? :40.80 ( 3.76X)
ABTN 236.9 258 S? :54.83 ( 2.91X)
***** 9 JULY 1988; 14:48 - NEWPORT, VIRGINIA *****
*VTSO OT= 14:48:39.67 LAT= 37.296N LON= 80.489W DEP= 3.0FXD KM MDB= 0.8
NO= 6, DMIN= 11 KM, GAP= 232 DEG, RMS= 0.49 SEC, Q= D, SQD= D/D
ERHMAX= 3.7 KM, AZ= 25 DEG; ERHMIN= 1.2 KM; ERZ= 4.8 KM; Q= C
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BLA 11.2 147 iP 14:48:41.80 ( 0.05 ) S 14:48:42.80 (-0.29 )
NAV 27.1 275 iP :44.10 (-0.42 ) iS :47.50 (-0.13 )
PUV 41.9 224 eP :48.70 ( 1.56X)
WMV 47.5 244 eP :49.10 ( 0.96 ) S :53.20 (-0.36 )
***** 15 JULY 1988; 13:15 - GREENBACK, TENNESSEE *****
*TVA OT= 13:15:28.97 LAT= 35.666N LON= 84.144W DEP= 13.8 KM MDB= 0.7
NO= 17, DMIN= 6 KM, GAP= 67 DEG, RMS= 0.13 SEC, Q= A, SQD= A/A
ERHMAX= 0.4 KM, AZ= 38 DEG; ERHMIN= 0.3 KM; ERZ= 0.5 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GBTN 6.0 270 iP 13:15:31.70 ( 0.11 ) iS 13:15:33.50 ( 0.00 )
ORT 30.7 332 eP :34.82 ( 0.11 ) iS :38.82 (-0.08 )
TKL 33.5 91 eP :35.10 (-0.04 ) iS :39.60 (-0.05 )
HPKT 37.5 40 eS :40.20 (-0.55X)
ETT 47.1 217 eP :37.20 (-0.12 ) eS :43.10 (-0.32 )
TQTN 55.3 253 eP :39.27 ( 0.68X) eS :45.27 (-0.34 )
CRTN 65.3 25 eP :40.22 ( 0.08 ) eS :48.47 ( 0.18 )
WSSR 67.0 130 eP :40.60 ( 0.12 ) eS :48.50 (-0.38 )
WMTN 88.4 239 eS :54.20 (-0.20 )
BBG 92.9 161 eS :55.20 (-0.55 )
GMG 101.1 208 eP :46.10 ( 0.41 ) eS :58.50 ( 0.61 )
***** 26 JULY 1988; 19:27 - CLEVELAND, TENNESSEE *****
*TVA OT= 19:27:26.36 LAT= 35.212N LON= 84.941W DEP= 19.2 KM MDB= 2.2
NO= 50, DMIN= 5 KM, GAP= 69 DEG, RMS= 0.20 SEC, Q= B, SQD= B/A
ERHMAX= 0.2 KM, AZ= -13 DEG; ERHMIN= 0.2 KM; ERZ= 0.6 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
WMTN 5.0 324 iPc 19:27:29.86 ( 0.14 ) iS 19:27:32.03 (-0.14 )
TQTN 39.0 30 iPd :33.49 (-0.06 ) iS :38.48 (-0.32 )
RCG 45.5 235 iP :34.65 ( 0.11 ) eS :40.25 (-0.26 )
GMG 45.9 147 iP :34.65 (-0.01 ) eS :40.60 (-0.12 )
ETT 46.0 74 iPd :34.68 ( 0.06 ) iS :40.65 ( 0.00 )
DCT 50.6 110 Pd :35.68 ( 0.37 ) S :41.96 ( 0.13 )
CBT 59.6 52 P- :36.82 ( 0.18 ) S :44.15 ( 0.00 )
TLT 60.7 80 S :43.96 (-0.48X)
BHT 70.5 360 eP :38.25 (-0.09 ) eS :46.85 (-0.24 )
CPO5 72.1 307 iPc :38.52 (-0.05 ) eS :47.48 ( 0.01 )
LKGA 81.4 217 iPd :39.91 (-0.07 ) iS :49.99 ( 0.06 )
PDTN 83.0 275 eP :40.19 (-0.02 ) iS :50.19 (-0.12 )
GBTN 83.3 53 eP :40.10 (-0.15 ) eS :50.10 (-0.28 )
ORT 96.5 36 eP :42.26 (-0.01 ) eS :55.09 ( 1.20X)
BBG 109.7 110 iP :43.90 (-0.47 ) eS :57.20 (-0.32 )
ANTN 109.7 346 eP :44.54 ( 0.23 ) eS :57.78 ( 0.37 )
TKL 116.9 65 eP :45.40 ( 0.01 ) eS :59.35 ( 0.07 )
WSSR 124.2 86 eP :46.90 ( 0.30 ) eS :28:01.00 (-0.37 )
HPKT 124.7 50 eP :44.20 (-2.37X) eS :01.40 ( 0.08 )
ABTN 129.7 306 eP- :47.42 ( 0.08 ) eS :03.21 ( 0.56 )
ONTN 147.9 18 eP- :49.86 (-0.29 ) eS :07.44 (-0.08 )
CRTN 148.1 42 eP :50.37 ( 0.20 ) eS :09.57 ( 2.02X)
MSAL 163.2 256 iPc :52.21 (-0.26 ) eS :11.59 ( 0.07 )
RBNC 178.5 84 eP :56.40 ( 1.45X) eS :15.60 (-0.22 )
FDKY 191.3 337 eP :56.89 ( 0.13 ) eS :19.45 ( 0.49 )
SHTN 200.9 279 eP :57.36 (-0.88 ) eS :20.82 (-0.69 )
SMTN 205.3 50 eP :59.10 ( 0.17 )
TDA 210.3 209 P :28:01.00 ( 1.53X) S :25.70 ( 2.05X)
BRTN 226.4 55 eP+ :02.15 ( 0.65 ) eS :29.04 ( 1.90X)
TCT 252.5 291 eP :05.11 ( 0.47 ) eS :33.94 ( 1.36X)
HAKY 257.0 325 eP :06.39 ( 1.21 ) eS :35.87 ( 2.35X)
***** 27 JULY 1988; 04:37 - DAYTON, TENNESSEE *****
*TVA OT= 04:37:17.83 LAT= 35.432N LON= 84.976W DEP= 18.1 KM MDB= 1.6
NO= 39, DMIN= 20 KM, GAP= 52 DEG, RMS= 0.23 SEC, Q= B, SQD= B/B
ERHMAX= 0.3 KM, AZ= -29 DEG; ERHMIN= 0.2 KM; ERZ= 0.8 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
WMTN 20.4 179 eP+ 04:37:22.57 ( 0.15 ) iS 04:37:25.88 ( 0.11 )
TQTN 24.5 68 iPd :22.79 (-0.14 ) iS :26.44 (-0.21 )
BHT 46.2 3 eP :25.90 (-0.20 ) eS :32.25 ( 0.11 )
ETT 48.7 104 eP :26.45 (-0.01 ) iS :32.50 (-0.27 )
CPO5 57.5 290 eP :28.17 ( 0.37X) eS :34.82 (-0.25 )
RCG 61.0 214 eP :28.30 (-0.01 ) eS :35.90 (-0.06 )
GMG 69.0 156 eP :29.50 (-0.09 ) eS :37.90 (-0.28 )
GBTN 74.1 69 iP :30.30 ( 0.00 ) eS :39.22 (-0.18 )
ORT 80.6 49 eP :31.24 (-0.06 ) iS :41.66 ( 0.53 )
PDTN 81.3 258 eP :31.26 (-0.15 ) eS :41.07 (-0.25 )
ANTN 85.3 344 eP- :31.85 (-0.19 ) eS :42.39 (-0.02 )
LKGA 100.5 207 eP :34.15 (-0.21 ) eS :46.66 ( 0.23 )
TKL 111.8 77 eP :35.90 (-0.17 ) eS :49.00 (-0.38 )
HPKT 113.4 61 S? :50.30 ( 0.50X)
ABTN 114.3 296 eP :36.74 ( 0.29 ) iS :50.14 ( 0.10 )
ONTN 126.0 22 eP :37.89 (-0.37 ) eS :52.54 (-0.64 )
WSSR 128.2 97 eP :38.80 ( 0.14 ) eS :53.42 (-0.44 )
CRTN 133.4 50 eP :39.29 (-0.09 ) eS :55.39 ( 0.29 )
FDKY 167.8 334 eP :44.82 ( 0.19 ) eS :38:05.10 ( 0.92X)
MSAL 167.8 248 eS :04.62 ( 0.44 )
SMTN 193.2 56 eP :49.00 ( 0.44 ) eS :11.70 ( 0.71 )
SHTN 195.6 272 eP :48.38 (-0.50 ) eS :10.92 (-0.63 )
HAKY 235.4 323 eS :22.00 ( 1.42X)
***** 29 JULY 1988; 02:33 - TUNNEL HILL, GEORGIA *****
*TVA OT= 02:33:00.84 LAT= 34.823N LON= 85.200W DEP= 15.3 KM MDB= 1.5
NO= 19, DMIN= 22 KM, GAP= 141 DEG, RMS= 0.16 SEC, Q= C, SQD= B/C
ERHMAX= 0.5 KM, AZ= -42 DEG; ERHMIN= 0.3 KM; ERZ= 1.8 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RCG 21.6 321 iP 02:33:05.55 ( 0.18 ) eS 02:33:08.62 (-0.06 )
LKGA 33.3 228 iPd :07.08 ( 0.00 ) eS :11.29 (-0.34 )
GMG 48.7 85 eP :09.67 ( 0.21 ) eS :15.75 ( 0.00X)
WMTN 51.5 24 eP :11.40 ( 1.57X) eS :16.21 (-0.19 )
DCT 75.8 70 P :13.70 ( 0.14 ) S :22.70 (-0.15 )
PDTN 77.5 310 eP :13.94 ( 0.13 ) eS :23.04 (-0.23 )
ETT 88.0 50 eP :15.60 ( 0.17 ) eS :25.40 (-0.67X)
TQTN 88.2 29 P? :16.85 ( 1.41X) eS :26.06 (-0.03 )
CPO5 93.1 339 eP :16.36 ( 0.15 ) eS :27.54 ( 0.11 )
BBG 127.2 87 eS :36.50 (-0.08 )
MSAL 134.8 272 eS :38.55 ( 0.12 )
ABTN 144.0 325 eP :24.11 ( 0.13 ) eS :41.47 ( 0.60 )
TKL 159.5 54 P? :27.80 ( 1.45X) eS :46.10 ( 1.12X)
SHTN 189.5 292 eS :53.14 ( 0.19 )
FDKY 224.8 346 S? :34:03.60 ( 1.78X)
***** 7 AUGUST 1988; 06:54 - SODDY, TENNESSEE *****
*TVA OT= 06:54:41.40 LAT= 35.284N LON= 84.968W DEP= 15.2 KM MDB= 1.6
NO= 17, DMIN= 4 KM, GAP= 83 DEG, RMS= 0.18 SEC, Q= B, SQD= B/A
ERHMAX= 0.4 KM, AZ= 37 DEG; ERHMIN= 0.3 KM; ERZ= 0.6 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
WMTN 4.0 187 iPd 06:54:44.06 (-0.06 ) iS 06:54:46.16 ( 0.05 )
RHT 24.2 161 P :46.31 ( 0.06 ) S :49.73 (-0.06 )
TQTN 33.9 40 eP :47.56 (-0.12 ) eS :52.26 (-0.01 )
ETT 46.9 84 eP :49.60 (-0.09 ) eS :55.50 (-0.24 )
RCG 48.7 225 eS :54.60 (-1.61X)
GMG 54.1 150 eP :50.20 (-0.63X) eS :55.70 (-2.02X)
DCT 56.1 117 P :51.52 ( 0.43 ) S :58.02 (-0.15 )
CBT 57.2 60 P :51.78 ( 0.53X) S :58.71 ( 0.26 )
BHT 62.5 2 eP :51.99 (-0.11 )
CPO5 65.4 303 iS :55:00.56 (-0.09 )
PDTN 80.2 269 eS :04.26 (-0.29 )
GBTN 80.7 58 eS :04.10 (-0.59 )
ORT 91.8 41 eS :08.91 ( 1.28X)
BBG 114.9 113 eS :12.60 (-1.30X)
ABTN 123.1 303 eP :55:01.46 ( 0.11 ) eS :16.26 ( 0.35 )
CRTN 144.0 45 P? :06.16 ( 1.60X) eS :23.26 ( 1.79X)
***** 14 AUGUST 1988; 06:38 - MARYVILLE, TENNESSEE *****
*TVA OT= 06:38:38.05 LAT= 35.750N LON= 84.013W DEP= 12.0 KM MDB= 0.9
NO= 12, DMIN= 23 KM, GAP= 174 DEG, RMS= 0.10 SEC, Q= C, SQD= B/C
ERHMAX= 0.5 KM, AZ= -32 DEG; ERHMIN= 0.3 KM; ERZ= 1.0 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
HPKT 23.0 32 iP- 06:38:42.60 ( 0.10 ) iS 06:38:45.70 (-0.05 )
ORT 31.7 304 eP :43.91 ( 0.05 ) iS :48.11 ( 0.00 )
CBT 43.7 238 Pd :45.90 ( 0.13 ) S :51.23 (-0.17 )
CRTN 52.3 17 eP :47.21 ( 0.04 ) eS :53.59 (-0.24 )
DCT 85.6 206 P :52.51 ( 0.07 ) S :39:02.87 (-0.08 )
RHT 108.6 227 P :55.75 (-0.20 )
ABTN 190.0 275 eS :30.91 ( 0.32 )
***** 14 AUGUST 1988; 17:06 - ETOWAH, TENNESSEE *****
*TVA OT= 17:06:45.45 LAT= 35.179N LON= 84.499W DEP= 15.6 KM MDB= 1.9
NO= 32, DMIN= 16 KM, GAP= 52 DEG, RMS= 0.21 SEC, Q= B, SQD= B/B
ERHMAX= 0.3 KM, AZ= -36 DEG; ERHMIN= 0.2 KM; ERZ= 0.7 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
DCT 15.7 152 P 17:06:49.47 ( 0.22 ) S 17:06:51.19 (-0.83X)
ETT 16.8 14 iPd :49.50 ( 0.11 ) iS :51.90 (-0.37 )
RHT 36.7 252 P :52.22 ( 0.05 ) S :56.73 (-0.34 )
GMG 38.5 204 iP- :52.19 (-0.32 )
CBT 40.6 10 P :53.05 ( 0.28 ) S :58.25 ( 0.13 )
TQTN 42.7 331 iP+ :53.08 ( 0.00 ) eS :58.43 (-0.22 )
WMTN 43.8 280 eP+ :53.08 (-0.19 ) eS :58.93 (-0.05 )
GBTN 60.0 26 iPd :55.70 (-0.04 ) iS :07:03.00 (-0.26 )
BBG 71.4 118 ePc :57.35 (-0.22 )
ORT 82.9 12 eP :59.83 ( 0.58X) eS :09.73 ( 0.41 )
BHT 84.4 331 eP :59.66 ( 0.14 )
WSSR 84.6 82 ePc :59.85 ( 0.26 )
TKL 84.6 51 iP+ :59.21 (-0.30 ) eS :09.59 (-0.18 )
CPO5 108.4 296 eP :07:03.28 ( 0.11 ) iS :16.23 ( 0.13 )
PDTN 123.4 275 eP :08.01 ( 2.57X) eS :19.83 (-0.21 )
CRTN 128.0 28 iP+ :06.43 ( 0.27 ) eS :21.23 (-0.04 )
ONTN 144.6 2 eP :09.53 ( 0.82X) eS :26.10 ( 0.40 )
ABTN 165.7 299 eP+ :12.23 ( 0.30 ) eS :31.28 ( 0.03 )
SMTN 178.9 41 S-P 20.54 SEC (-0.28 )
BRTN 197.0 48 eS :40.40 ( 0.80 )
MSAL 201.9 260 eS :41.00 ( 0.18 )
FDKY 213.5 327 eP- :19.63 ( 0.39 ) eS :45.23 ( 1.33X)
SHTN 241.2 278 eS :51.20 ( 1.34X)
***** 20 AUGUST 1988; 03:48 - INDEPENDENCE, VIRGINIA *****
*TVA OT= 03:48:53.90 LAT= 36.739N LON= 81.176W DEP= 11.9 KM MDB= 2.3
NO= 27, DMIN= 8 KM, GAP= 118 DEG, RMS= 0.32 SEC, Q= C, SQD= C/B
ERHMAX= 0.8 KM, AZ= -62 DEG; ERHMIN= 0.3 KM; ERZ= 0.6 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
PLVA 8.2 170 iPc 03:48:56.62 ( 0.04 ) iS 03:48:57.96 (-0.58X)
PWV 67.1 10 eS :49:14.00 ( 0.05 )
NAV 72.6 28 eP :49:06.40 ( 0.08 ) eS :15.50 ( 0.11 )
PKNC 76.9 179 eP :07.28 ( 0.28 ) eS :16.68 ( 0.12 )
BLA 85.2 52 eS :18.50 (-0.23 )
GFM 89.8 219 eP :08.42 (-0.64 ) eS :19.34 (-0.78X)
SLTN 90.7 249 eP :50:09.82 ( 0.77X) eS :50:19.87 (-0.23 )
HWV 99.1 17 eS :22.50 ( 0.12 )
BENN 137.4 199 eP :16.00 (-0.27 ) eS :33.04 ( 0.44 )
BRBC 149.2 222 eP :18.90 ( 0.72 ) eS :35.91 ( 0.00 )
BRTN 157.3 255 eP :81.12 ( 1.82X) eS :98.42 ( 0.58 )
RICH 173.3 239 eP :21.84 ( 0.06 ) eS :42.15 ( 0.02 )
SMTN 183.9 258 eP :24.16 ( 0.78 ) eS :45.92 ( 1.02X)
TRYN 189.7 211 eP :25.64 ( 1.36X) eS :46.44 (-0.02 )
CCVA 223.2 267 eS :54.16 (-1.08 )
RBNC 223.9 227 eP :29.84 ( 0.24 ) eS :55.50 (-0.16 )
CRTN 246.2 257 eP :33.37 ( 1.21 ) eS :51:00.65 ( 0.56 )
TKL 262.6 244 eP :36.60 ( 2.45X) eS :04.08 ( 0.55 )
WSSR 270.5 234 eP :35.84 ( 0.60 ) eS :06.04 ( 0.62 )
-----
*VTSO OT= 03:48:54.13 LAT= 36.734N LON= 81.172W DEP= 10.3 KM MDB= 1.5
NO= 20, DMIN= 8 KM, GAP= 145 DEG, RMS= 0.42 SEC, Q= C, SQD= C/C
ERHMAX= 1.8 KM, AZ= -66 DEG; ERHMIN= 0.6 KM; ERZ= 1.3 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
PLVA 7.6 172 iPc 03:48:56.62 ( 0.08 ) S 03:48:57.96 (-0.19 )
PWV 67.5 9 eS :49:14.00 ( 0.18 )
NAV 72.8 27 eP :49:06.40 (-0.20 ) eS :15.50 ( 0.21 )
PKNC 76.4 179 eP :07.28 ( 0.08 ) eS :16.68 ( 0.36 )
BLA 85.3 51 eS :18.50 (-0.21 )
GFM 89.6 220 eP :08.42 (-0.93 ) S :19.34 (-0.61 )
HWV 99.5 17 eS :22.50 ( 0.13 )
BENN 137.0 199 eP :16.00 (-0.53 ) S :33.04 ( 0.86 )
BRBC 149.1 223 eP :18.90 ( 0.42 ) S :35.91 ( 0.44 )
RICH 173.4 239 eP :21.84 (-0.27 ) S :42.15 ( 0.48 )
SMTN 184.1 258 eP :24.16 ( 0.42 )
TRYN 192.4 211 eP :25.64 ( 0.62 ) S :46.44 (-0.17 )
***** 23 AUGUST 1988; 22:00 - TAZEWELL, TENNESSEE *****
*TVA OT= 22:00:28.43 LAT= 36.378N LON= 83.596W DEP= 18.7 KM MDB= 1.5
NO= 18, DMIN= 30 KM, GAP= 166 DEG, RMS= 0.18 SEC, Q= C, SQD= B/C
ERHMAX= 0.9 KM, AZ= -26 DEG; ERHMIN= 0.2 KM; ERZ= 1.3 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
CRTN 29.6 228 iPc 22:00:34.26 (-0.03 ) iS 22:00:38.66 ( 0.09 )
SMTN 37.1 89 eP :35.00 (-0.38 ) eS :40.50 ( 0.05 )
HPKT 56.3 207 P? :38.10 (-0.09 ) iS :45.10 (-0.21 )
BRTN 65.4 92 eP- :39.66 ( 0.05 ) iS :47.91 ( 0.14 )
ONTN 76.9 279 eP :41.29 (-0.06 ) eS :49.24 (-1.55X)
TKL 81.5 191 eS :52.10 ( 0.13 )
ORT 82.3 231 eP :42.76 ( 0.60X) eS :52.91 ( 0.72X)
GBTN 96.5 215 eP :44.50 ( 0.17 ) eS :56.00 ( 0.07 )
SLTN 132.5 86 eP :52.21 ( 2.39X) eS :01:06.61 ( 1.18X)
TQTN 139.8 227 eP :51.64 ( 0.70X) eS :08.94 ( 1.56X)
ETT 140.2 214 eP :51.00 (-0.03 ) eS :07.50 (-0.03 )
ANTN 148.7 262 eP- :51.94 (-0.40 ) S? :08.44 (-1.35X)
BBG 168.0 187 eP :56.00 ( 0.64 ) eS :16.20 ( 1.18X)
WMTN 176.7 225 eP :57.21 ( 0.61 ) eS :18.81 ( 1.65X)
FDKY 202.0 284 eS :24.70 ( 0.86 )
PLVA 220.5 81 :01:00.00 (-2.97X) eS :30.00 ( 1.82X)
ABTN 232.7 257 eS :33.89 ( 3.34X)
***** 26 AUGUST 1988; 03:42 - TROUT DALE, VIRGINIA *****
*TVA Probable earthquake
*TVA OT= 03:42:58.36 LAT= 36.617N LON= 81.493W DEP= 6.0 KM MDB= 1.0
NO= 7, DMIN= 30 KM, GAP= 188 DEG, RMS= 0.21 SEC, Q= D, SQD= C/D
ERHMAX= 0.9 KM, AZ= -21 DEG; ERHMIN= 0.3 KM; ERZ= 7.1 KM; Q= D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
PLVA 30.3 79 iPd 03:43:03.84 ( 0.02 ) iS 03:43:07.66 (-0.14 )
SLTN 59.4 251 eP :07.64 (-0.91X) eS :16.04 ( 0.05 )
GFM 62.8 207 eP :09.90 ( 0.69X) iS :16.60 (-0.54 )
PKNC 70.1 154 iP :10.66 ( 0.29 ) eS :19.52 ( 0.39 )
BENN 117.7 187 eS :32.50 ( 0.04 )
TRYN 164.4 205 eS :46.12 ( 1.26X)
***** 27 AUGUST 1988; 16:52 - CENTRAL VIRGINIA *****
*VTSO This shock was felt (MMI= IV) in Goochland and Louisa counties.
*VTSO OT= 16:52:29.53 LAT= 37.718N LON= 77.775W DEP= 14.3 KM MDB= 2.7
NO= 13, DMIN= 31 KM, GAP= 159 DEG, RMS= 0.27 SEC, Q= C, SQD= B/C
ERHMAX= 0.9 KM, AZ= -62 DEG; ERHMIN= 0.7 KM; ERZ= 1.4 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
GHV 30.5 286 iPd 16:52:35.14 ( 0.07 ) eS 16:52:38.90 (-0.21 )
NA12 30.9 343 iPd :35.33 ( 0.21 ) eS :39.10 (-0.10 )
NA5 32.7 6 ePc :35.54 ( 0.14 ) eS :39.43 (-0.25 )
CNV 64.6 33 eS :47.89 (-0.37 )
CVL 67.1 296 eP :41.08 ( 0.31 ) eS :49.19 ( 0.26 )
FRV 77.0 222 eP :42.31 ( 0.01 ) eS :50.82 (-0.74 )
PBV 84.4 165 eP :43.59 ( 0.17 ) eS :53.68 ( 0.19 )
***** 2 SEPTEMBER 1988; 12:36 - MADISONVILLE, TENNESSEE *****
*TVA Probable earthquake
*TVA OT= 12:36:10.75 LAT= 35.522N LON= 84.345W DEP= 21.5 KM MDB= 0.4
NO= 4, DMIN= 24 KM, GAP= 200 DEG, RMS= 0.00 SEC, Q= D, SQD= C/D
ERHMAX= 2.1 KM, AZ= -70 DEG; ERHMIN= 0.4 KM; ERZ= 3.5 KM; Q= C
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ETT 23.9 205 iP 12:36:16.10 ( 0.00 ) eS 12:36:20.00 ( 0.00 )
ORT 43.2 5 iS :24.47 ( 0.00 )
WMTN 64.7 242 eS :29.97 ( 0.00 )
***** 7 SEPTEMBER 1988; 02:28 - OWINGSVILLE, KENTUCKY *****
*TVA Felt; main shock
*NEIC Slight damage (VI) at Camp Dix, Jeffersonville, Means, Moorefield,
and Olympia. Felt strongly in much of eastern Kentucky and parts of
Indiana, Ohio, Tennessee, and West Virginia. An aftershock of magnitude
3.8 mbLg (BLA) occurred two to three minutes later.
*TVA OT= 02:28:08.45 LAT= 38.141N LON= 83.856W DEP= 5.0 KM MDB= 4.6
NO= 16, DMIN= 183 KM, GAP= 93 DEG, RMS= 0.21 SEC, Q= C, SQD= B/D
ERHMAX= 0.7 KM, AZ= 57 DEG; ERHMIN= 0.6 KM; ERZ= 1.7 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
IN4 182.7 331 P 02:28:38.00 (-0.15 )
ONTN 191.4 196 iPc :39.26 (-0.25 )
SOKY 197.8 250 iPd :38.00 (-2.47X)
SMTN 204.1 163 iPc :41.76 ( 0.28 )
IN3 208.7 307 P :42.30 ( 0.17 )
CRTN 215.4 180 iPc :43.21 ( 0.03 )
BRTN 216.5 156 iPc :43.36 ( 0.00 )
FDKY 227.8 229 iPd :45.11 ( 0.05 )
AN4 230.8 359 P :45.70 ( 0.17 )
SLTN 243.2 140 iPc :46.81 (-0.27 )
HPKT 245.8 180 iPc :46.85 (-0.57X)
ANTN 250.4 210 eP+ :48.80 ( 0.78X)
ORT 250.8 189 eP+ :48.10 ( 0.06X) eS 02:29:17.01 ( 0.07 )
AN1 260.1 355 iP :49.60 ( 0.43X) eS :20.80 ( 1.91X)
PWV 263.1 109 eP :49.60 ( 0.01 )
RICH 263.2 159 ePc :49.24 (-0.39X)
AN10 264.0 349 eP :49.4 (-0.24X) eS :21.5 ( 1.80X)
AN3 266.7 1 eP :50.50 ( 0.53X)
HAKY 266.9 245 eP- :50.01 ( 0.03 )
HWV 272.2 102 eP+ :50.72 ( 0.05 ) eS :22.00 ( 0.50 )
BHT 272.4 201 eP :51.02 ( 0.28X)
TKL 275.6 178 ePc :50.50 (-0.57X)
GBTN 276.4 187 eP+ :50.98 (-0.18X)
AN11 277.5 346 eP :51.20 (-0.09X)
NAV 285.0 108 eP :52.08 (-0.17X)
PLVA 289.3 124 iP- :52.46 (-0.41X)
GFM 289.6 140 iPc :52.88 (-0.08X)
AN9 290.1 349 eP :52.50 (-0.33X) S? :27.00 ( 1.77X)
PUV 295.7 114 eP :53.43 (-0.13X)
AN7 297.6 360 eP :53.80 ( 0.06X)
TQTN 301.4 195 eP+ :54.5 ( 0.29X) eS :30.81 ( 3.19X)
VWV 314.1 103 ePd :55.80 (-0.05X)
ETT 316.9 190 eP+ :56.68 ( 0.53X)
RBNC 318.5 166 eP+ :56.16 (-0.34X)
WSSR 318.6 175 ePc :56.14 (-0.31X)
IN1 318.8 327 eP :55.40 (-0.93X) S? :33.40 ( 2.12X)
BLA 320.1 108 ePc :56.42 (-0.12X) eS :31.80 ( 0.16X)
ABTN 320.7 219 eP- :57.00 ( 0.42X)
IN2 322.0 309 iP :57.10 ( 0.37X)
PKNC 334.0 133 eP- :58.30 ( 0.04X)
WMTN 336.2 198 eP- :58.90 ( 0.43X) eS :41.51 ( 6.52X)
BENN 346.4 145 eP- :59.56 (-0.23X)
TRYN 349.8 155 iP+ :29:00.26 ( 0.05X)
BBG 362.5 179 eP+ :01.44 (-0.38X)
PDTN 364.6 210 eP+ :02.20 ( 0.25X)
WSIL 370.7 277 eP- :04.93 ( 2.26X) S :47.77 ( 5.51X)
GMG 371.0 192 eP :02.94 ( 0.12X)
RCG 375.8 201 eP :03.66 ( 0.33X)
NHIL 379.6 268 ePd :05.77 ( 2.02X) S :55.55 (11.43X)
CIRL 380.8 261 ePd :05.23 ( 1.33X) S :51.18 ( 6.81X)
LLKY 398.5 251 eP :06.80 ( 0.73X) eS :48.00 (-0.13X)
MOTN 403.0 246 ePc :07.30 ( 0.68X)
TCT 405.2 235 eP+ :07.70 ( 0.80X)
BPIL 415.1 272 eP+ :09.98 ( 1.89X) S :30:08.51 (16.89X)
SHTN 416.9 225 ePc :09.30 ( 0.96 )
GOIL 427.1 259 ePd :10.85 ( 1.29X) S :09.80 (15.63X)
CSIL 437.7 264 ePd :12.11 ( 1.25X) S :01.98 ( 5.57X)
MSAL 444.2 215 eP :12.40 ( 0.74X)
FMKY 476.4 251 eP :16.70 ( 1.11X) eS :04.90 ( 0.30X)
ELC 483.0 260 ePd :17.36 ( 0.97X) S :23.50 (17.51X)
CRU 488.5 251 eP- :18.19 ( 1.13X) S :34.82 (27.67X)
UTM 495.8 247 eP+ :18.56 ( 0.60X)
FRV 495.9 100 eP :17.46 (-0.52X)
MILT 503.1 241 ePc :19.04 ( 0.19X)
GHV 506.5 93 eP- :19.14 (-0.12 ) S? :16.00 ( 5.05X)
PWLA 514.6 228 eP+ :20.92 ( 0.66X)
NA12 524.7 90 eP :21.66 ( 0.17X)
NA2 535.5 88 eP :23.26 ( 0.46X)
NA5 537.0 90 eP :23.10 ( 0.11X)
PBV 573.2 101 eP+ :26.84 (-0.57X)
EBZ 593.4 238 eP :32.24 ( 2.35X)
SFTN 630.9 243 iP+ :36.84 ( 2.39X)
WLA 695.2 244 eP :42.86 ( 0.53X)
OLY 739.4 249 eP :47.98 ( 0.23X)
HOGG 816.0 249 iP :59.04 ( 1.93X)
-----
*VTSO OT= 02:28:08.55 LAT= 38.142N LON= 83.834W DEP= 10.0FXD KM MDB= 4.5
mbLg= 4.6
NO= 48, DMIN= 184 KM, GAP= 102 DEG, RMS= 0.31 SEC, Q= D, SQD= C/D
ERHMAX= 0.7 KM, AZ= 76 DEG; ERHMIN= 0.4 KM; ERZ= 1.8 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
IN4 183.7 330 P 02:28:38.00 (-0.07 )
ONTN 192.0 197 iPc :39.26 (-0.12 )
SOKY 199.7 251 iPd :38.00 (-2.51X)
SMTN 203.7 163 iPc :41.76 ( 0.59 )
IN3 210.6 307 P :42.30 ( 0.12 )
CRTN 215.5 180 iPc :43.21 ( 0.25 )
BRTN 215.9 156 iPc :43.36 ( 0.33 )
FDKY 229.3 230 iPd :45.11 ( 0.05 )
AN4 231.0 359 P :45.70 ( 0.38 )
SLTN 242.1 141 iPc :46.81 (-0.29 )
HPKT 245.9 181 iPc :46.85 (-0.70 )
ORT 251.3 190 eP+ :48.10 (-0.11 ) eS 02:28:17.01 ( 0.89 )
ANTN 251.4 210 eP+ :48.80 ( 0.54 )
AN1 260.7 354 iP :49.60 ( 0.24 ) eS :20.80 ( 2.72X)
PWV 261.3 109 eP :49.60 ( 0.10 )
RICH 262.6 160 ePc :49.24 (-0.43 )
AN10 264.5 348 eP :49.40 (-0.42 ) eS :21.50 ( 2.63X)
AN3 267.2 0 eP :50.50 ( 0.35 )
HAKY 268.7 245 eP- :50.01 (-0.31 )
HWV 270.4 102 eP+ :50.72 ( 0.16 ) eS :22.00 ( 1.86X)
BHT 273.2 202 eP :51.02 ( 0.07 )
TKL 275.7 179 ePc :50.50 (-0.69 )
GBTN 276.8 187 eP+ :50.98 (-0.35 )
AN11 278.6 345 eP :51.20 (-0.34 )
NAV 283.3 108 eP :52.08 (-0.07 )
PLVA 287.8 124 iP- :52.46 (-0.34 )
GFM 288.5 141 iPc :52.88 (-0.06 )
AN9 290.9 349 eP :52.50 (-0.54 ) S? :27.00 ( 2.62X)
PUV 294.0 114 eP :53.43 (-0.05 )
AN7 297.7 360 eP :53.80 (-0.08 )
TQTN 302.1 196 eP+ :54.50 ( 0.09 ) eS :30.81 ( 4.10X)
AN12 310.0 355 P :55.30 (-0.08 )
VWV 312.3 103 ePd :55.80 ( 0.06 )
ETT 317.4 190 eP+ :56.68 ( 0.36 )
RBNC 318.2 166 eP+ :56.16 (-0.42 )
BLA 318.3 108 ePc :56.42 (-0.02 ) eS :31.80 ( 1.61X)
WSSR 318.6 176 ePc :56.14 (-0.43 )
IN1 320.2 327 eP :55.40 (-1.22X) S? :33.40 ( 2.89X)
RSCP 321.7 209 eP :56.50 (-0.27 )
ABTN 322.0 220 eP- :57.00 ( 0.14 )
IN2 324.0 309 iP :57.10 ( 0.01 )
PKNC 332.7 134 eP- :58.30 ( 0.08 )
WMTN 336.9 198 eP- :58.90 ( 0.22 ) eS :29:01.50 ( 7.49X)
BENN 345.4 145 eP- :59.56 (-0.22 )
TRYN 350.5 156 iP+ :29:00.26 (-0.15 )
BBG 362.6 180 eP+ :01.44 (-0.51 )
PDTN 365.7 210 eP+ :02.20 ( 0.00 )
GMG 374.4 192 eP :02.94 (-0.42 )
RCG 376.6 202 eP :03.66 ( 0.11 )
LLKY 400.4 252 eP :06.80 ( 0.39X) eS :48.00 ( 0.76X)
MOTN 404.8 247 ePc :07.30 ( 0.35X)
-----
*NEIC OT= 02:28:09.54 LAT= 38.143N LON= 83.878W DEP= 10.0FXD mb= 4.5
mbLg= 4.6
NO= 49, STD DEV= 0.8 SEC, DMIN= 178 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
IN4 177.9 331 P 02:28:38.00 (- 0.4 )
ONTN 189.0 195 P :39.30 (- 0.4 )
SOKY 200.2 250 P :38.20 (- 2.1 )
SMTN 200.2 162 P :41.80 ( 0.3 )
IN3 211.3 308 P :42.30 ( 0.5 )
CRTN 211.3 179 P :43.20 ( 0.3 )
BRTN 222.4 155 P :43.80 ( 0.6 )
FDKY 222.4 229 P :45.00 ( 0.7 )
AN4 233.5 0 P :45.70 ( 0.9 )
SLTN 244.6 140 P :46.80 ( 0.0 )
ANTN 244.6 209 P :48.20 ( 0.9 )
ORT 255.8 189 P :48.10 ( 0.6 )
AN1 255.8 355 P :49.60 ( 0.9 )
AN10 266.9 349 P :49.50 ( 0.4 )
HAKY 266.9 245 P :50.00 ( 0.7 )
AN3 266.9 1 P :50.50 ( 1.0 )
BHT 266.9 201 P :51.00 ( 0.8 )
TKL 278.0 178 eP :50.60 ( 0.0 )
GBTN 278.0 186 eP :50.90 ( 0.2 )
AN11 278.0 346 P :51.20 ( 0.4 )
NAV 289.1 108 eP :51.80 (- 0.3 )
AN9 289.1 350 P :52.90 ( 0.5 )
PLVA 289.1 123 P :52.50 (- 0.2 )
AN7 300.2 0 P :53.90 ( 0.5 )
TQTN 300.2 195 P :54.40 ( 0.5 )
AN12 311.4 355 P :55.30 ( 0.3 )
IN1 322.5 328 P :55.90 (- 0.1 )
RSCP 322.5 209 eP :56.50 ( 0.1 )
IN2 322.5 309 P :57.20 ( 0.8 )
BLA 322.5 108 eP :56.30 (- 0.3 )
LLKY 400.3 251 P :29:06.70 ( 0.7 )
CLE 422.6 28 iP :09.20 (- 0.2 )
PRM 467.0 163 eP :14.40 (- 1.1 )
FMKY 478.2 251 P :16.80 ( 0.8 )
CVL 478.2 91 eP :16.00 (- 0.2 )
ELC 478.2 260 eP :16.30 (- 0.6 )
JSC 489.3 150 eP :15.90 (- 2.0X)
GRT 533.8 249 eP :24.20 ( 0.5 )
NA2 533.8 88 eP :23.20 (- 0.8 )
CBN 567.1 87 eP :37.00 ( 8.8X)
FVM 578.2 270 eP :28.30 (- 0.5 )
DHN 711.7 41 eP :43.80 (- 2.0X)
PRIN 822.9 70 eP :57.30 (- 3.5X)
PNJ 889.6 67 ePn :30:03.10 (- 5.5X)
TBR 889.6 65 eP :05.30 (- 3.7X)
RLO 1011.9 261 eP :21.10 (- 3.0X)
OTT 1056.4 38 eP :24.50 (- 4.3X)
RSNY 1056.4 45 eP :25.50 (- 3.9X)
TUL 1089.8 261 ePd :30.80 (- 2.5X)
VVO 1100.9 257 eP :31.80 (- 3.4X)
SIO 1134.2 260 eP :36.40 (- 3.1X)
PCO 1167.6 266 ePn :40.70 (- 2.8X)
OCO 1245.4 261 Pn :52.00 (- 0.8X)
FKO 1245.4 259 ePn :49.10 (- 3.9X)
RRO 1323.3 261 ePn :55.50 (- 6.9X)
MEO 1367.7 259 ePn :31:03.10 (- 4.6X)
GLD 1857.0 282 eP :32:03.00 (- 2.1 )
GOL 1868.1 282 eP :03.00 (- 3.6X)
ALQ 2046.1 267 eP :27.00 ( 0.3 )
BW06 2224.0 292 eP :44.00 (- 1.8 )
SCH 2257.3 29 eP :46.00 (- 2.3X)
FFC 2301.8 329 eP :50.00 (- 1.7X)
LRM 2502.0 299 eP :33:13.30 ( 2.6X)
EUR 2780.0 283 iP :36.60 ( 1.8X)
EDM 2813.3 316 eP :38.00 ( 0.6 )
PMR 5081.8 323 eP :36:31.50 (- 0.8 )
HFS 6816.5 35 eP :38:25.90 (- 1.1 )
SOD 6961.1 24 eP :35.00 (- 0.7 )
SUF 7239.1 29 iP :53.10 ( 1.1 )
***** 7 SEPTEMBER 1988; 02:30 - OWINGSVILLE, KENTUCKY *****
*TVA Aftershock of 9/7/88, 02:28 earthquake; in coda of main shock; therefore,
only S arrivals can be used for location; for informational purposes only
*NEIC This is an aftershock of the 9/7/88, 02:28 event and has
a magnitude of mb(Lg)= 3.8
*VTSO This event has a magnitude of mb(Lg)= 3.8 (7 stations)
*TVA OT= 02:30:32.87 LAT= 38.170N LON= 83.756W DEP= 8.0FXD KM MDB= 0.0
NO= 9, DMIN= 240 KM, GAP= 123 DEG, RMS= 0.53 SEC, Q= D, SQD= D/D
ERHMAX= 4.0 KM, AZ= 84 DEG; ERHMIN= 1.2 KM; ERZ= 33.3 KM; Q= D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
SLTN 240.3 142 eS 02:30:38.00 (-0.48 )
ORT 255.6 191 eS :38.60 (-3.16X)
AN1 257.8 353 iS :42.64 ( 0.42 )
AN10 262.7 347 eS :40.64 (-2.61X)
AN3 263.5 359 eS :42.32 (-1.11 )
HWV 264.4 103 eS :46.40 ( 2.74X)
AN11 276.8 344 eS :45.92 (-0.30 )
TKL 278.7 180 iS :47.10 ( 0.44 )
AN9 288.7 348 eS :48.08 (-0.67 )
AN7 294.5 358 eS :47.60 (-2.37X)
TQTN 306.9 197 eS :52.20 (-0.41 )
BLA 312.7 109 eS :54.25 ( 0.33 )
ABTN 328.8 220 eS :56.30 (-0.95 )
WMTN 342.0 199 eS :31:02.01 ( 1.97X)
PDTN 371.9 211 eS :10.01 ( 3.66X)
***** 7 SEPTEMBER 1988; 02:35 - OWINGSVILLE, KENTUCKY *****
*TVA Aftershock of 9/7/88, 02:28 earthquake; for informational purposes only
*TVA OT= 02:35:41.54 LAT= 38.161N LON= 83.851W DEP= 8.0FXD KM MDB= 2.2
NO= 8, DMIN= 194 KM, GAP= 287 DEG, RMS= 0.24 SEC, Q= D, SQD= D/D
ERHMAX= 3.9 KM, AZ= 29 DEG; ERHMIN= 2.3 KM; ERZ= 33.3 KM; Q= D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ONTN 193.6 196 S? 02:35:35.13 (-0.37 )
CRTN 217.6 180 eP 02:35:16.29 (-0.10 ) eS :41.97 ( 0.13 )
BRTN 218.4 156 eP :16.45 (-0.07 ) S? :42.06 (-0.01 )
FDKY 229.5 229 eP :18.60 ( 0.44 ) eS :44.81 (-0.09 )
SLTN 244.7 141 S? :51.20 ( 3.13X)
ANTN 252.5 209 eP :24.41 ( 3.40X) S? :50.77 ( 0.94 )
HAKY 268.2 245 eS :55.33 ( 2.27X)
TKL 277.8 179 S? :57.60 ( 2.47X)
TQTN 303.7 195 S? :36:03.41 ( 2.84X)
ABTN 322.6 219 eS :06.64 ( 2.03X)
***** 9 SEPTEMBER 1988; 09:59 - OWINGSVILLE, KENTUCKY *****
*TVA Aftershock of 9/7/88, 02:28 earthquake
*TVA OT= 09:59:36.22 LAT= 38.161N LON= 83.883W DEP= 8.1 KM MDB= 2.3
NO= 13, DMIN= 56 KM, GAP= 228 DEG, RMS= 0.22 SEC, Q= D, SQD= C/D
ERHMAX= 2.4 KM, AZ= -11 DEG; ERHMIN= 1.0 KM; ERZ= 4.8 KM; Q= C
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
BHKY 56.3 256 eP 09:59:46.30 ( 0.38 ) iS 09:59:52.90 (-0.10 )
CCVA 173.9 174 eP+ :03.10 (-1.29X)
ONTN 192.9 195 eP :07.30 ( 0.00 ) eS :29.94 (-0.04 )
SMTN 207.0 162 iP :09.20 (-0.27 ) eS :34.20 ( 0.46 )
CRTN 217.7 179 eP :11.07 (-0.01 ) eS :36.70 ( 0.17 )
BRTN 219.5 155 eP :11.28 (-0.10 ) eS :35.14 (-1.91X)
FDKY 227.4 229 eP :12.88 ( 0.32X) eS :40.06 ( 0.98X)
SLTN 246.5 140 eP :14.88 (-0.01 ) eS :43.24 ( 0.12 )
ANTN 251.1 209 eP :16.65 ( 1.13X) iS :45.57 ( 1.37X)
ORT 252.6 189 eS :46.07 ( 1.60X)
HAKY 265.7 245 eP :18.56 ( 1.32X) eS :50.30 ( 3.12X)
RICH 266.2 159 eP :17.50 ( 0.10X)
BHT 273.6 201 eP :18.74 ( 0.45X)
TKL 277.9 178 eP :20.10 ( 1.34X) eS :53.00 ( 3.19X)
GBTN 278.4 186 eP :21.00 ( 2.19X) eS :53.50 ( 3.60X)
PLVA 292.6 124 eP :20.76 ( 0.08 ) eS :53.00 (-0.13 )
GFM 292.9 140 eP :19.94 (-0.82X)
TQTN 302.9 195 P? :23.82 ( 2.01X) eS :59.34 ( 4.25X)
ETT 318.7 189 eP :25.90 ( 2.13X) eS :60:04.00 ( 5.51X)
ABTN 320.9 219 eP :25.76 ( 1.75X) eS :01.32 ( 2.42X)
WSSR 321.0 175 eP :23.26 (-0.90X)
RBNC 321.3 165 eP :24.16 (-0.09X)
PKNC 337.3 133 eP :25.64 (-0.43X)
WMTN 337.6 197 eP :28.85 ( 2.79X) eS :06.24 ( 3.81X)
BBG 364.8 179 eP :29.06 (-0.45X)
***** 10 SEPTEMBER 1988; 05:35 - SOUTHWESTERN NORTH CAROLINA *****
*TVA OT= 05:35:19.61 LAT= 35.236N LON= 84.197W DEP= 13.2 KM MDB= 1.6
NO= 20, DMIN= 26 KM, GAP= 87 DEG, RMS= 0.21 SEC, Q= B, SQD= B/B
ERHMAX= 0.3 KM, AZ= -5 DEG; ERHMIN= 0.3 KM; ERZ= 0.6 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ETT 25.5 293 ePc 05:35:24.76 ( 0.21 ) iS 05:35:28.02 (-0.14 )
DCT 28.6 225 P :25.00 ( 0.00 ) S :27.80 (-1.14X)
GBTN 47.8 358 eP :28.36 ( 0.33 ) iS :33.94 (-0.23 )
BBG 53.4 139 iPc :29.38 ( 0.37 ) eS :35.50 (-0.37 )
WSSR 56.5 85 eP :30.08 ( 0.57X) iS :36.54 (-0.20 )
TQTN 57.2 303 eP :29.62 ( 0.06 ) eS :36.50 (-0.32 )
GMG 59.8 226 iP :30.04 ( 0.01 ) iS :37.48 (-0.17 )
TKL 60.6 39 eP :30.16 ( 0.08 ) eS :37.72 ( 0.00 )
WMTN 70.7 271 P? :32.20 ( 0.57X) eS :40.27 (-0.14 )
ORT 75.4 353 eS :41.62 (-0.03 )
RBNC 110.9 83 eS :51.06 (-0.24 )
CRTN 111.7 17 eP :38.26 ( 0.34 ) S? :51.52 ( 0.23 )
SMTN 156.8 36 eP :46.78 ( 1.93X) eS :36:04.74 ( 1.46X)
ABTN 187.8 293 eP :50.64 ( 1.08X) eS :11.27 (-0.15 )
***** 15 SEPTEMBER 1988; 23:40 - TELLICO PLAINS, TENNESSEE *****
*TVA OT= 23:40:59.08 LAT= 35.308N LON= 84.210W DEP= 11.2 KM MDB= 1.9
NO= 36, DMIN= 22 KM, GAP= 71 DEG, RMS= 0.20 SEC, Q= B, SQD= B/B
ERHMAX= 0.3 KM, AZ= -69 DEG; ERHMIN= 0.2 KM; ERZ= 0.7 KM; Q= A
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ETT 22.4 275 iPd 23:41:03.36 (-0.05 ) iS 23:41:06.10 (-0.48X)
CBT 32.1 323 P :04.90 ( 0.00 ) S :09.40 ( 0.25 )
DCT 34.0 214 P :05.00 (-0.22 ) S :09.90 ( 0.20 )
GBTN 39.8 360 iPc :06.16 ( 0.03 ) iS :11.00 (-0.29 )
RCT 41.2 276 P :06.50 ( 0.13 ) S :12.00 ( 0.31 )
TQTN 52.3 296 eP+ :07.95 (-0.22 ) eS :13.84 (-0.97X)
TKL 55.4 45 eP :08.54 (-0.16 ) eS :15.74 ( 0.02 )
WSSR 57.6 93 eP- :09.44 ( 0.33 ) eS :16.00 (-0.43 )
BBG 60.3 143 eP- :09.70 ( 0.14 ) eS :17.20 (-0.01 )
GMG 64.8 221 eP :10.04 (-0.24 ) eS :18.30 (-0.16 )
RHT 66.3 248 P :09.90 (-0.58X) S :17.80 (-1.00X)
ORT 67.3 353 eP :10.74 ( 0.09 ) eS :19.14 ( 0.04 )
WMTN 69.8 265 eP :11.14 ( 0.09 ) eS :19.44 (-0.35 )
HPKT 74.9 23 eP :11.85 (-0.01 ) eS :20.40 (-0.79X)
BHT 89.6 312 eP :14.14 (-0.02 )
CRTN 104.5 19 eP :16.54 ( 0.13 ) eS :29.14 ( 0.08 )
RCG 110.1 251 eP :17.14 (-0.13 )
RBNC 111.4 87 eP :17.54 (-0.05 ) eS :30.90 (-0.20 )
ANTN 133.2 316 eP- :20.54 (-0.27 )
LKGA 138.0 237 P? :21.74 ( 0.18 ) eS :37.94 (-0.04 )
SMTN 151.1 38 iP :24.04 ( 0.47 ) eS :45.90 ( 4.44X)
TRYN 178.7 91 eS :48.06 (-0.73 )
ABTN 183.7 291 P? :29.84 ( 1.31X) eS :50.04 ( 0.02 )
GFM 235.0 67 eP :37.14 ( 0.94 ) eS :42:04.90 ( 1.60X)
***** 15 SEPTEMBER 1988; 23:42 - TELLICO PLAINS, TENNESSEE *****
*TVA Aftershock of 9/7/88, 02:28 earthquake
*TVA OT= 23:42:52.90 LAT= 35.306N LON= 84.204W DEP= 6.2 KM MDB= 1.2
NO= 17, DMIN= 23 KM, GAP= 72 DEG, RMS= 0.22 SEC, Q= C, SQD= C/C
ERHMAX= 0.4 KM, AZ= -69 DEG; ERHMIN= 0.3 KM; ERZ= 3.8 KM; Q= C
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
ETT 22.9 276 eP 23:42:57.06 (-0.03 ) iS 23:42:59.80 (-0.34 )
CBT 32.5 323 P :59.00 ( 0.34 ) S :43:03.00 ( 0.13 )
DCT 34.2 215 P :59.00 ( 0.05 ) S :02.90 (-0.47X)
GBTN 39.9 359 iP :43:00.00 ( 0.11 ) iS :04.70 (-0.29 )
TQTN 52.8 296 eS :07.75 (-0.91X)
TKL 55.2 45 eP :02.32 (-0.09 ) eS :09.90 ( 0.54X)
WSSR 57.0 93 eP :03.56 ( 0.78X) eS :09.70 (-0.30 )
BBG 59.9 143 eP :03.40 ( 0.15 ) eS :11.40 ( 0.59X)
GMG 65.0 221 eP :04.18 ( 0.09 ) eS :12.00 (-0.26 )
RHT 66.7 248 S :12.60 (-0.05 )
ORT 67.5 352 eS :12.78 (-0.11 )
WMTN 70.3 265 eS :13.08 (-0.59X)
CRTN 104.4 18 eP :10.36 (-0.18 ) S? :23.14 (-0.28 )
ABTN 184.2 291 S? :45.36 ( 0.83 )
***** 19 SEPTEMBER 1988; 17:18 - OWINGSVILLE, KENTUCKY *****
*TVA Aftershock of 9/7/88, 02:28 earthquake; for informational purposes only
*TVA OT= 17:18:23.03 LAT= 38.135N LON= 83.906W DEP= 5.9 KM MDB= 1.5
NO= 7, DMIN= 4 KM, GAP= 241 DEG, RMS= 0.10 SEC, Q= D, SQD= D/D
ERHMAX= 5.7 KM, AZ= -67 DEG; ERHMIN= 2.6 KM; ERZ= 4.8 KM; Q= D
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
JUDY 3.7 274 Pd 17:18:24.30 ( 0.03 ) S 17:18:25.10 (-0.07 )
PKKY 81.1 70 P :35.30 (-1.53X)
ONTN 189.5 195 eS :19:16.20 ( 0.05 )
CRTN 214.8 178 eP :57.23 (-0.36 ) eS :23.03 ( 0.21 )
BRTN 217.7 155 eP :57.83 (-0.23 ) eS :24.02 ( 0.40 )
ORT 249.5 188 eS :33.33 ( 2.29X)
HAKY 262.7 245 eS :36.90 ( 3.11X)
***** 27 OCTOBER 1988; 03:47 - MIDDLETON GARDENS, SOUTH CAROLINA *****
*USC OT= 03:47:03.29 LAT= 32.943N LON= 80.135W DEP= 8.1 KM MDL= 1.2
NO= 5, DMIN= 5 KM, GAP= 132 DEG, RMS RES= 0.03 SEC, Q= C, SQD= A/D
ERH= 0.8 KM, ERZ= 1.3 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MGS 5.1 186 iPd 03:47:07.54 ( 0.07 ) S 03:47:08.16 (-2.58X)
RGR 6.9 233 iPd :07.56 ( 0.03 ) S :09.07 (-1.88X)
BCS 7.3 55 iPd :07.80 (-0.02 ) S :09.64 (-1.71X)
SVS 11.0 285 iPd :08.16 ( 0.00 )
TWB 19.3 9 eP+ :11.72 ( 2.37X)
HBF 22.8 267 iPd :09.28 ( 0.01 )
-----
*USGS OT= 03:47:05.39 LAT= 32.857N LON= 80.172W DEP= 7.6 KM ML= 1.0
NO= 11, DMIN= 5 KM, RMS= 0.315 SEC, dx= 2.344 km, dy= 6.557 km, dz= 3.741 km
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MGS 5.3 33 iPc 03:47:07.34 ( 0.12 ) S 03:47:08.03 (-0.24 )
RGR 5.8 339 iPd :07.40 ( 0.19 ) S :08.87 ( 0.19 )
SVS 14.3 329 iPd :08.06 (-0.43 ) S :09.05 (-0.83 )
BCS 17.2 36 iPd :08.48 (-0.36 ) S :09.03 (-1.10 )
HBF 21.1 293 eP- :09.24 ( 0.12 ) S :10.98 (-0.19 )
TWB 29.3 12 eP+ :11.52 ( 0.61 )
NOTE: Fault Plane Solution (strike, dip, rake)
Nodal Plane: 160.0 35.0 40.0 Nodal Plane: 35.5 68.4 118.2
P Axis: 104.9 71.4 T Axis: 343.5 32.9
***** 30 NOVEMBER 1988; 13:58 - SLANDSVILLE, SOUTH CAROLINA *****
*USC OT= 13:58:53.61 LAT= 32.998N LON= 80.211W DEP= 7.8 KM MDL= 1.2
NO= 8, DMIN= 5 KM, GAP= 152 DEG, RMS RES= 0.12 SEC, Q= C, SQD= B/C
ERH= 1.2 KM, ERZ= 1.1 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
SVS 4.8 228 iPu 13:58:57.93 ( 0.19 )
RGR 10.4 171 iPu :58.25 ( 0.05 ) S 13:58:59.68 (-2.27X)
MGS 12.9 150 iPu :58.69 (-0.02 )
BCS 13.1 98 iPu :58.93 ( 0.05 ) S :59:01.62 (-1.36X)
TWB 16.4 38 iP- :58.20 (-1.00 ) S :01.87 (-1.68X)
HBF 17.2 245 iPd :58.63 (-0.05 ) S :00.95 (-1.69X)
WAS 17.6 199 iPd :59.27 (-0.11 ) S :01.42 (-2.46X)
SGS 35.5 308 Pd :59:03.20 ( 0.85X)
TRK 42.7 71 iPd :03.57 ( 0.01 )
-----
*USGS OT= 13:58:55.87 LAT= 32.964N LON= 80.221W DEP= 9.2 KM ML= 1.6
NO= 23, DMIN= 3 KM, RMS= 0.229 SEC, dx= 0.740 km, dy= 0.972 km, dz= 1.132 km
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
SVS 2.6 281 iPc 13:58:57.80 ( 0.03 ) S 13:58:58.75 (-0.21 )
RGR 7.0 158 iPc :58.23 ( 0.20 ) S :59.59 ( 0.02 )
MGS 10.6 134 iPc :58.56 ( 0.03 ) S :59:00.05 (-0.16 )
WAS 13.8 200 iPd :59.18 ( 0.28 ) S :01.28 ( 0.13 )
BCS 15.0 82 iPc :58.94 (-0.16 ) S :01.55 ( 0.09 )
HBF 15.1 256 iPd :58.53 (-0.21 ) S :00.06 (-0.26 )
TWB 20.1 33 iPd :58.08 (-1.76 ) S :01.85 (-0.38 )
DRC 22.4 315 eP+ :58.74 (-1.40 ) S :03.08 (-0.12 )
CFS 35.2 7 eP :59:02.95 ( 0.54 )
SGS 37.2 313 iPd :03.13 ( 0.36 ) S :07.05 (-0.31 )
VEW 37.9 136 eP- :02.58 (-0.28 )
TRK 44.9 67 iPd :03.55 ( 0.02 ) S :08.40 (-0.20 )
VRN 67.8 276 eP- :07.23 (-0.16 )
NOTE: Fault Plane Solution (strike, dip, rake)
Nodal Plane: 160.0 25.0 70.0 Nodal Plane: 1.9 66.6 99.1
P Axis: 85.0 68.9 T Axis: 288.6 22.8
***** 11 DECEMBER 1988; 18:56 - HILLSVILLE, VIRGINIA *****
*VTSO This event was felt locally (MMI= III).
*VTSO OT= 18:56:59.82 LAT= 36.754N LON= 80.734W DEP= 7.6 KM MDB= 2.2
NO= 21, DMIN= 31 KM, GAP= 177 DEG, RMS= 0.35 SEC, Q= C, SQD= C/C
ERHMAX= 1.2 KM, AZ= -65 DEG; ERHMIN= 0.5 KM; ERZ= 2.4 KM; Q= B
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
PUV 30.7 346 ePd 18:57:05.68 ( 0.35 ) eS 18:57:09.37 ( 0.34 )
PLVA 39.3 256 iPd :06.82 ( 0.04 ) iS :11.46 (-0.03 )
WMV 44.6 332 ePd :07.78 ( 0.13 ) eS :13.13 ( 0.18 )
BLA 57.9 29 ePc :09.89 ( 0.08 ) iS :16.82 ( 0.12 )
NAV 62.5 355 eP :11.13 ( 0.56 ) eS :17.79 (-0.22 )
PWV 70.2 337 eP? :11.43 (-0.43 ) eS :19.50 (-0.72 )
VWV 84.6 21 eP :13.99 (-0.26 ) eS :24.19 (-0.13 )
PKNC 87.3 206 iPd :14.44 (-0.24 ) eS :25.00 (-0.07 )
HWV 93.3 354 eS? :26.63 (-0.12 )
GFM 119.8 234 iPd :19.26 (-0.57 ) eS :34.70 ( 0.89 )
BENN 156.1 213 eP :25.64 ( 0.32 ) eS :44.82 ( 1.66X)
BRBC 179.3 232 eP :28.54 (-0.43 ) eS :50.56 ( 1.22X)
FRV 217.2 76 eP :35.12 ( 0.50X) eS :59.45 ( 0.47X)
CVL 243.1 55 ePd :38.19 (-0.39X) eS :58:06.91 ( 1.20X)
GHV 260.0 63 eP :40.75 (-0.03X) eS :11.59 ( 1.98X)
PBV 286.7 84 eS :13.89 (-1.30X)
NA12 287.3 61 eP? :44.54 ( 0.42X) eS :18.37 ( 3.05X)
NA2 305.1 59 eP :48.02 ( 1.73X) eS :23.83 ( 4.79X)
***** 13 DECEMBER 1988; 03:00 - CHARLESTON, SOUTH CAROLINA *****
*USC OT= 03:00:59.04 LAT= 32.935N LON= 80.134W DEP= 5.8 KM MDL= 2.0
NO= 10, DMIN= 7 KM, GAP= 181 DEG, RMS RES= 0.11 SEC, Q= C, SQD= A/D
ERH= 1.0 KM, ERZ= 1.1 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
RGR 6.5 239 iPu 03:01:03.10 ( 0.10 )
BCS 7.7 49 iPd :03.38 ( 0.03 ) S 03:01:05.09 (-1.62X)
SVS 11.3 289 iPu :03.62 (-0.13 )
HBF 22.8 269 iPu :04.78 (-0.16 )
DRC 30.2 307 iPu :07.02 ( 0.17 )
CFS 38.2 355 iPd :08.19 (-0.04 )
TRK 39.2 58 iPd :08.42 ( 0.02 )
SGS 45.4 309 iPd :09.42 (-0.05 ) S :15.40 (-2.21X)
COW 72.3 313 eP+ :13.85 ( 0.14 ) S :21.56 (-3.60X)
VRN 76.3 279 eP+ :14.44 ( 0.09 )
MTT 166.6 303 eP+ :28.03 ( 0.29X) S :48.00 (-2.13X)
JSC 181.9 325 ePd :29.45 ( 0.00X) S :52.00 (-1.17X)
LHS 182.3 340 eP- :29.39 (-0.10X) S :52.43 (-0.81X)
PRM 243.2 302 eP- :37.17 ( 0.21X) S :02:07.31 ( 0.77X)
-----
*USGS OT= 03:01:01.39 LAT= 32.949N LON= 80.150W DEP= 5.4 KM ML= 2.4
NO= 33, DMIN= 6 KM, RMS= 0.186 SEC, dx= 0.636 km, dy= 0.710 km, dz= 1.085 km
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MGS 5.8 171 iPc 03:01:02.95 (-0.06 ) S 03:01:04.16 (-0.01 )
RGR 6.3 220 iPc :03.19 ( 0.16 ) S :04.83 ( 0.31 )
BCS 9.0 66 iPd :03.36 (-0.06 ) S :05.10 ( 0.11 )
SVS 9.5 283 iPc :03.30 (-0.29 ) S :04.40 (-0.41 )
WAS 16.0 225 eP+ :04.70 ( 0.14 ) S :06.59 (-0.05 )
TWB 18.9 13 iPd :05.08 ( 0.06 ) S :07.35 (-0.10 )
HBF 21.4 265 iPc :04.73 (-0.35 ) S :06.10 (-0.69 )
DRC 28.4 308 iPc :06.88 ( 0.12 ) S :10.40 ( 0.00 )
VEW 32.3 142 eP+ :07.21 (-0.17 )
CFS 36.6 357 iPd :08.10 ( 0.10 ) S :11.90 (-0.22 )
TRK 39.7 61 iPd :08.33 ( 0.15 ) S :11.85 (-0.31 )
SGS 43.3 308 iPc :09.45 ( 0.20 )
COW 70.5 313 eP- :14.60 ( 0.85 ) S :25.23 ( 1.12 )
VRN 74.6 277 eP- :14.42 ( 0.18 )
MTT 164.1 302 eP+ :27.95 ( 0.04 ) S :48.00 ( 0.32 )
JSC 179.6 325 eP- :29.40 (-0.15 ) S :51.65 ( 0.55 )
LHS 180.3 340 eP+ :29.33 (-0.23 ) S :52.40 ( 0.84 )
PRM 240.2 301 eP+ :37.12 (-0.12 ) S :07.95 ( 1.57 )
NOTE: Fault Plane Solution (strike, dip, rake)
Nodal Plane: -5.0 5.0 160.0 Nodal Plane: 104.9 88.3 85.3
P Axis: -160.5 46.9 T Axis: 10.1 43.5
NOTE: Alternate Fault Plane Solution (strike, dip, rake)
Nodal Plane: -90.0 15.0 50.0 Nodal Plane: 131.0 78.6 99.8
P Axis: -147.2 57.1 T Axis: 53.2 34.6
HYPOCENTRAL PARAMETERS, MAGNITUDES, AND ARRIVAL TIMES FOR
RESERVOIR ACTIVITY: JULY THROUGH DECEMBER 1988
***** 19 JULY 1988; 19:31 - MONTICELLO RESERVOIR, SOUTH CAROLINA *****
*USC OT= 19:31:15.56 LAT= 32.334N LON= 81.336W DEP= 2.7 KM MDL= 2.0
NO= 13, DMIN= 4 KM, GAP= 142 DEG, RMS RES= 0.05 SEC, Q= B, SQD= A/C
ERH= 0.3 KM, ERZ= 0.5 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MR01 3.7 93 iPd 19:31:16.35 ( 0.02 ) S 19:31:16.90 (-0.06 )
MR07 4.2 13 iPu :16.45 ( 0.05 ) S :17.10 ( 0.01X)
MR9A 5.2 174 iPd :16.48 ( 0.05 ) S :17.35 ( 0.02 )
MR6A 5.8 149 iP- :16.58 (-0.05 ) S :17.42 (-0.08X)
MR05 7.3 179 iP- :16.95 ( 0.10 ) S :18.00 ( 0.09 )
JSC 9.1 130 iPd :17.12 (-0.01 ) S :18.45 ( 0.04 )
MR08 10.8 321 iP- :17.25 (-0.13 ) S :18.90 ( 0.03X)
MR02 18.4 148 iPd :18.65 ( 0.03 ) S :21.10 (-0.03 )
***** 30 SEPTEMBER 1988; 17:46 - MONTICELLO RESERVOIR, SOUTH CAROLINA *****
*USC OT= 17:46:30.42 LAT= 34.325N LON= 81.307W DEP= 1.7 KM MDL= 2.1
NO= 16, DMIN= 1 KM, GAP= 88 DEG, RMS RES= 0.05 SEC, Q= A, SQD= A/A
ERH= 0.2 KM, ERZ= 0.4 KM
STA DIST (KM) AZM PHASE ARRIVAL TIME (RES) PHASE ARRIVAL TIME (RES)
MR01 1.3 51 iPd 17:46:30.76 (-0.03 ) S 17:46:31.15 ( 0.06 )
MR10 3.1 295 iPd :31.00 (-0.03 ) S :31.60 ( 0.07X)
MR6A 4.0 175 iPu :31.13 (-0.02 ) S :31.85 ( 0.09 )
MR9A 4.6 207 iPd :31.15 (-0.10 ) S :31.90 (-0.03 )
MR07 5.4 342 iPd :31.40 ( 0.03 ) S :32.15 ( 0.00 )
JSC 6.5 139 iPu :31.55 ( 0.00 ) S :32.45 (-0.02 )
MR05 6.8 202 iPd :31.65 ( 0.06 ) S :32.60 ( 0.05 )
MR02 16.2 154 iPu :33.15 ( 0.03 ) S :35.30 (-0.04 )
LHS 48.9 69 ePd :38.30 ( 0.04 ) S :44.65 (-0.04X)
Appendix A. Definitions and Operator Listing
Below are some entries in this Bulletin that might require definition.
Also given is a detailed listing of agencies or groups (and their letter codes)
that supply information to this Bulletin.
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. For this Bulletin the following statistics apply
for error estimates:
CERI, TVA, and VTSO: Error ellipse projected semi-axes from
HYPOELLIPSE corresponding to a chi-square statistic (68%)
with one degree of freedom,
GIT: Error ellipse projected semi-axes from LOCA, and
USC: Standard error estimates from HYPO71.
NEIC and USGS: Unknown,
GAP: The largest azimuthal separation (in deg) between
recording stations,
HYPOELLIPSE: Computer hypocenter location program (Lahr, 1980),
HYPO71: Computer hypocenter location program (Lee and Lahr, 1974),
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),
MD, MDB, MDL: Duration/coda length magnitude that approximates either
the mb, ML, or an unknown magnitude scale, respectively.
As of June 1986 (SEUSSN Bulletin 17), those using a duration
magnitude approximating mb(Lg) are CERI, DGS, GIT, TVA
and VTSO. Specifically:
CERI: MDB = -2.36 + 2.23 Log(D) + 0.12 Log(K) (MDB > 2.6)
MDB = -3.38 + 2.74 Log(D) (MDB < 2.7)
VTSO, TVA, and GIT: 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 noise,
and K is the epicentral distance in kilometers. Those using
a duration magnitude approximating ML are USC and USGS.
Specifically:
USGS: MDL = -0.87 + 2.0 Log(D) + 0.0035 X
where D is signal duration measured from the P-wave arrival
time to the time when the signal returns to twice background
noise, and X is the epicentral distance in kilometers.
For more information please see SEUSSN Bulletin 17 (page 1)
or contact the agency making the estimate for details on their
specific procedure,
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. '?' indicates that the arrival
time is questionable.
Q: Solution quality of the hypocenter (the average of the
SQD quality measures, see below; 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
CERI - Center for Earthquake Research and Information, TN
(formerly, Tennessee Earthquake Information Center, TEIC, changed 1 July 1987)
CPL - Carolina Power and Light Company, NC
DGS - Delaware Geological Survey, DE
DPC - Duke Power Company, SC
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
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
VP - Virginia Power, 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. 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. After the station listing is a plot of those stations, followed
by maps of individual networks (with station identification codes) operated by
major member agencies or groups of the SEUSSN.
Sta. Lat. N Lon. W Elev. Dates Current
Code (Dg-Min) (Dg-Min) (M) Open-Close Operator Locality
ABTN 35-53.13 86-06.54 363 8409- TVA Auburntown, TN
AMG 32-03.56 84-13.06 122 7309- GSW Americus, GA
ANTN 36-10.30 85-13.88 612 8305- TVA Anderson, TN
ATL 33-26.00 84-20.25 272 6300- GIT Atlanta, GA
BAV 37-13.32 80-25.50 622 7200- VTSO Blacksburg, VA
BBD 39-20.50 75-40.60 18 - DGS Blackbird, DE
BBG 34-52.44 83-48.66 1355 8201- CERI Brasstown Bald, GA
BC 35-01.06 83-01.88 860 8701- DPC Bad Creek Res., SC
BCS 32-58.84 80-03.69 12 7603- BCC -USGS Baptist College, SC
BENN 35-33.90 81-39.66 878 8201- CERI Benn Knob, NC
BEV 34-05.36 82-44.00 158 8006- GIT Clark Hill Res., GA
BG3 34-59.58 82-55.90 366 - DPC Lake Jocassee, SC
BHT 35-50.82 84-56.70 826 8110- CERI Blowhole, TN
BKA 33-38.03 87-58.14 122 8104- GIT -GSA Kennedy, AL
BLA 37-12.68 80-25.21 634 6200- VTSO Blacksburg, VA
BRBC 35-44.34 82-17.16 1976 8205- CERI Mt. Mitchell, NC
BRTN 36-21.40 82-52.07 630 8606- TVA Brown Mtn., TN
BVD 39-46.49 75-29.96 58 8502- DGS Bellevue State Park, DE
BWD 39-47.96 75-34.60 63 8502- DGS Brandywine State Park, DE
CBN 38-12.30 77-22.40 70 7100- USGS Corbin, VA
CBT 35-32.36 84-25.24 357 8204- GIT Christianburg, TN
CCVA 36-36.18 83-40.02 571 8211- CERI Cudjo Cave, VA
CDG 34-36.65 84-40.00 332 - GIT Carters Dam, GA
CEH 35-53.45 79-05.57 152 7508- UNC Chapel Hill, NC
CFS 33-16.72 80-10.16 26 8805- USC -USGS Pigeon Bay, SC
CHF 34-01.48 82-35.20 152 7702- GIT Calhoun Falls, SC
CH6 33-53.63 82-31.75 130 7604- GIT Clark Hill Res., GA
CNV 38-12.30 77-22.40 70 7807- VTSO Corbin, VA
COW 33-23.05 80-42.05 60 7710- USC -USGS Cow Castle Creek, SC
CPO5 35-36.23 85-34.41 570 8404-8811 TVA Cumberland Plateau (V5), TN
CRTN 36-11.99 83-50.44 488 8408- TVA Comb Ridge, TN
CVL 37-58.88 78-27.65 167 7807- VTSO Charlottesville, VA
CVV 37-58.88 78-27.65 167 7404- VDMR Charlottesville, VA
DALG 34-46.53 85-00.82 457 8411- GIT Dalton, GA
DCT 35-03.25 84-25.16 508 8204- GIT Ducktown, TN
DRC 33-06.47 80-23.31 20 8303- USC -USGS Dorchester, SC
EP1 33-57.08 82-30.82 134 7700- GIT Clark Hill Res., GA
ETG 33-17.47 83-21.04 137 7802- GIT Eatonton, GA
ETT 35-19.56 84-27.30 588 8111- CERI Etowah, TN
FDKY 36-47.40 85-47.65 306 8703- TVA Freedom, KY
FRV 37-12.18 78-21.56 216 7812- VTSO Farmville, VA
GAI 29-38.75 82-20.36 51 7711- UFL Gainesville, FL
GBTN 35-39.96 84-12.66 326 8303- CERI Greenback, TN
GBV 38-25.93 79-50.72 802 7711- NASA Green Bank, WV
GFM 36-06.66 81-48.42 1726 8205- CERI Grandfather Mtn., NC
GHV 37-47.65 78-06.44 107 7810- VTSO Goochland, VA
GLT 36-21.72 86-29.88 159 8111- CERI-VCSS Gallatin, TN
GMG 34-50.16 84-40.20 1097 8509- CERI Grassy Mtn., GA
GTD 38-44.48 75-24.86 15 - DGS Georgetown, DE
HAKY 37-06.34 86-35.10 169 8706- TVA Hadley, KY
HBF 32-55.98 80-22.68 10 7303- USC -USGS Harts Bluff, SC
HGA 34-15.61 85-50.78 384 8104- GIT -GSA Collinsville, AL
HPKT 35-55.56 83-52.74 305 8003- GIT -TVA Knoxville, TN
HVA 34-01.58 86-46.15 195 8104- GIT -GSA Hanceville, AL
HWD 32-44.35 80-17.00 9 8303- BCC -USGS Hollywood, SC
HWV 37-35.43 80-50.45 521 7804- VTSO Hinton, WV
IVA 34-16.33 82-44.76 168 8006- GIT Clark Hill Res., GA
JSC 34-16.74 81-15.48 120 7405- USC -USGS Jenkinsville, SC
LDV 34-08.87 82-41.00 162 8006- GIT Clark Hill Res., GA
LEX 37-47.36 79-26.50 311 7105- WAL Lexington, VA
LHS 34-28.74 80-48.48 120 7405- USC -USGS Liberty Hill, SC
LKGA 34-37.40 85-28.33 655 8512- TVA Lookout Mtn., GA
LMTN 35-53.21 83-24.59 610 8403- TVA Little Mtn., TN
MGS 32-53.82 80-08.45 9 7603- BCC -USGS Middleton Gardens, SC
MLA 32-42.33 87-41.62 55 8104- GIT -GSA Sawyerville, AL
MMC 34-46.79 82-54.91 280 8707- DPC Morgan Memorial Church, SC
MOTN 36-37.08 87-59.20 177 8308- TVA Model, TN
MRG 39-37.98 79-57.26 281 7511- WVU Morgantown, WV
MR01 34-19.91 81-17.74 131 7711- USC -SCEG Monticello Res., SC
MR02 34-11.58 81-13.81 84 7711- USC -SCEG Monticello Res., SC
MR05 34-16.05 81-20.05 103 - USC -SCEG Monticello Res., SC
MR07 34-22.23 81-19.50 134 7807- USC -SCEG Monticello Res., SC
MR08 34-24.53 81-24.55 112 7807- USC -SCEG Monticello Res., SC
MR10 34-20.18 81-20.25 137 7807- USC -SCEG Monticello Res., SC
MR6A 34-17.32 81-18.15 145 - USC -SCEG Monticello Res., SC
MR9A 34-17.24 81-19.75 145 - USC -SCEG Monticello Res., SC
MSAL 34-50.80 86-40.41 260 8307- TVA Monte Sano, AL
MTT 33-45.08 81-38.17 182 7608- USC -USGS Monetta, SC
NAV 37-18.94 80-47.61 610 7710- VTSO Narrows, VA
NA2 38-07.62 77-44.82 82 7810- VTSO-VP North Anna, VA
NA5 38-00.65 77-44.19 76 7808- VTSO-VP North Anna, VA
NA12 37-58.98 77-52.77 125 7808- VTSO-VP North Anna, VA
NED 39-42.25 75-42.49 47 - DGS Newark, DE
OCA 34-36.83 86-26.11 250 8104- GIT -GSA Owens Crossroads, AL
ONTN 36-28.89 84-26.60 635 8402- TVA Oneida, TN
ORT 35-54.57 84-18.29 370 7500- TVA Oak Ridge, TN
PBV 36-58.94 77-31.87 49 7811- VTSO Petersburg, VA
PDTN 35-16.40 85-50.97 335 8509- TVA Piedmont, TN
PKNC 36-02.76 81-09.48 785 8211- CERI Pores Knob, NC
PLVA 36-39.98 81-09.63 1353 8211- CERI Point Lookout, VA
PRM 34-05.00 82-21.80 254 7507- USC -USGS Parsons Mtn., SC
PUV 37-01.41 80-48.95 652 7802- VTSO Pulaski, VA
PWLA 34-58.80 88-03.84 204 8005- CERI- SLU Pickwick Lake, AL
PWV 37-20.09 81-02.93 820 7803- VTSO Princeton, WV
RBNC 35-21.42 82-59.16 1829 8205- CERI Richland Balsam, NC
RCG 34-58.50 85-20.88 468 8110- CERI Rock City, GA
RCT 35-20.72 84-39.68 265 8204- GIT Riceville, TN
RGR 32-54.33 80-11.63 -52 8606- BCC -USGS (Roger Stewart) SC
RHT 35-04.69 84-52.95 299 8204- GIT Red Hill, TN
RICH 35-55.20 82-49.20 967 8306- CERI Rich Mtn., NC
SGS 33-11.58 80-30.72 25 7303- USC -USGS St. George, SC
SHTN 35-27.58 87-07.78 323 8509- TVA Sandy Hook, TN
SLTN 36-26.59 82-07.23 1280 8401- TVA Sullivan, TN
SMT 34-55.85 82-58.26 498 7704- USC Smeltzer Mtn. (Jocassee), SC
SMTN 36-22.92 83-10.92 768 8210- CERI Short Mtn., TN
SRPD 33-09.30 81-42.75 31 7608- DUP Savannah River Lab, SC
SRPN 33-19.74 81-35.33 95 7608- DUP Savannah River Lab, SC
SRPW 33-12.14 81-34.69 77 7608- DUP Savannah River Lab, SC
SVS 32-58.13 80-14.92 3 7603- USC -USGS Slandsville, SC
TCT 36-00.32 87-33.17 245 8803- TVA Tennessee City, TN
TDA 33-32.50 86-01.48 181 8104- GIT -GSA Talladega, AL
TKL 35-39.48 83-46.44 350 7800- CERI-TVA Tuckaleechee Caverns, TN
TLT 35-18.07 84-17.00 512 8204- GIT Tellico Plains, TN
TQTN 35-30.96 84-43.55 260 8607- TVA Tranquillity, TN
TRK 33-07.33 79-46.66 10 8303- USC -USGS Turkey Creek, SC
TRYN 35-14.76 82-16.02 915 8303- CERI Tryon Peak, NC
TSA 33-15.37 87-04.05 180 8104- GIT -GSA Tannehill State Park, AL
TVG 34-22.63 85-18.14 323 7905- GIT Rocky Mtn. Net, GA
TWB 33-06.90 80-06.15 9 8803- BCC -USGS Mt. Zion Church, SC
VBV 36-47.12 76-06.48 5 7705- TCC Virginia Beach, VA
VEW 32-43.06 79-56.49 -58 8107- USC -USGS Oceanview, SC
VRN 33-02.25 80-56.50 30 7912- USC -USGS Varneville, SC
VWV 37-27.96 80-23.50 963 8207- VTSO VA-WV Border
WAS 32-50.86 80-16.32 9 8303- BCC -USGS West Ashley, SC
WMTN 35-14.88 84-58.39 378 8507- TVA White Oak Mtn., TN
WMV 37-06.51 80-58.23 1157 8210- VTSO Walker Mtn., VA
WSSR 35-16.68 83-34.68 1340 8510- CERI Wesser Bald, NC
CHANGES TO THE SEUSSN STATION LISTING
Sta.
Code Operator Locality Change
CPO5 TVA Cumberland Plateau, Closed, November 1988
HWD BCC-USGS Hollywood, SC Corrected long., May 1989
TCT TVA Tennessee City, TN Opened, March 1988
FIGURE 8. Seismic Stations (Open Triangles) Operating in the SEUSSN from July
through December 1988. The SEUSSN monitoring area is outlined.
FIGURE 9. Georgia Tech - Geological Survey Of Alabama Seismic Network.
FIGURE 10. South Carolina Seismic Network.
FIGURE 11. Center for Earthquake Research and Information - Southern
Appalachian Regional Seismic Network.
FIGURE 12. Tennessee Valley Authority Seismic Network.
FIGURE 13. Virginia Tech Seismic Network.
Appendix C. Errata and Addenda
*VTSO When the earthquake of 801105 (21:48Z; originally reported in
Bulletin 7, page 28), was relocated (Bulletin 18; Appendix E, pages 67-72), the
location moved from Virginia to West Virginia.
*VTSO The earthquake of 860213 (11:35Z) was mistakenly reported in both the
tectonic and the reservoir event listings of Bulletin 18 (pages 19-20 and page
39). The event is considered to be related to Lake Keowee in South Carolina.
*TVA/CERI The event of 890506 (15:42Z) in Bulletin 22 (page 47) was probably a
blast.
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