BULLETIN NO 7 TABLE OF CONTENTS Page Introduction 1 Southeastern United States Seismicity 8 Notices South Carolina Seismic Report 8 Tennessee Preliminary Seismological Bulletins 9 Kentucky Earthquake of July 27, 1980 - Reconnaissance Report 9 Acknowledgments 10 Appendix. Detection and Location Capability of the Southeastern United States Seismic Network 30 Mailing List 37 List of Figures Number Caption 1. Seismic Stations Operating During the Period July - December 1980 2 2. South Carolina Seismic Networks 3 3. Virginia Tech Seismic Network 4 4. Georgia Tech Seismic Network 5 5. Report Period Epicenter Map 10 6. Earthquake Epicenters for the Period July 1977 - December 1980 11 List of Tables Table 1. Seismic Stations Operating During Report Period 13 Table 2. Earthquakes Located During Report Period 16 INTRODUCTION This report is the seventh semi-annual Bulletin of Seismicity of the Southeastern United States. It covers the period July through December, 1980. The organizations supplying data for this Bulletin are the Carolina Power and Light Company, the E. I. DuPont de Nemours and Company, Inc. (Savannah River Laboratory), University of Florida, Georgia Institute of Technology, NASA (Goddard Space Flight Center- Geophysics Branch), University of North Carolina, University of South Carolina, Tennessee Earthquake Information Center, Union Carbide Corporation (Nuclear Division), United States Geological Survey, Virginia Division of Mineral Resources, Virginia Polytechnic Institute and State University, Washington and Lee University and West Virginia University. Table 1 is a listing, by state, of the 89 stations operating during the period January-June, 1980. The format of the information included in the table is as follows: 1). Three or four letter station code, 2). Station latitude in decimal degrees, north, 3). Station longitude in decimal degrees, west, 4). Station elevation, meters, 5). Geographic name of station, 6). Station operator. Figure 1 is a geographic map of the entire Southeastern United States Seismic Network (SEUSSN). Figures 2, 3, and 4 show the South Carolina, Virginia, and Georgia Networks, respectively. Each of these networks has station spacings too close to be shown clearly on Figure 1. Table 2 is a listing of the hypocentral parameters, phase arrival times and magnitude estimates for earthquakes that occurred in the Southeastern United States during the report period. Most items in the listing are self-explanatory and all times are Coordinated Universal Time. Some entries that might require definition are: AZ= Epicenter-to-station azimuth in degrees, DIST= Epicentral distance in degrees (Deg) or kilometers (Km), DPTH= Focal depth estimate in Km; FXD indicates that the depth was held fixed during the epicentral determination, GAP= The largest sector, in degrees, where there were no observing stations (HYPO71), HOR SEMI-AXES (KM, DEG)= Lengths (km) and azimuths (deg) of principal axes (horizontal projection) of error ellipsoid (HYPOELLIPSE; J. C. Lahr, USGS Open File Report 79-431), MBN= Body wave magnitude determination using Nuttli's formulas for the Lg phase, MEUS= Body wave magnitude determination using Evernden's formula for the Pn phase, ML= Local magnitude; contact agency or group making the estimate for details on their specific procedure, MLD= Local magnitude determined from duration of vibrations, MSZ= Surface wave magnitude determined from the long period vertical seismogram, NO= Number of phases used in the hypocenter determination, Q= Solution quality of error ellipsoid based on length of largest semi-axis (HYPOELLIPSE), or Solution quality of the hypocenter (HYPO71), RES= P wave residual in seconds; observed arrival time - calculated arrival time, RMS= Root mean square error of time residuals in sec (HYPO71), VERT SEMI-AXIS (KM)= Length (km) of principal vertical axis of error ellipsoid (HYPOELLIPSE). *XXXX= Agency or group that made the hypocentral determination. It is important to note that this Bulletin contains an especially relevant Appendix that presents the detection and location capability of the SEUSSN (page 30). Also, even-numbered Bulletins have a Station Information Appendix that gives specific information on the operator, seismograph types, operating characteristics, recording formats, etc. SOUTHEASTERN UNITED STATES SEISMICITY There were 50 earthquakes located by SEUSSN during the report period: 35 in South Carolina, 7 in Virginia, 4 in West Virginia and 4 in Kentucky. Nine of the 50 events had magnitudes (MBN or MLD) equal to or greater than 2.5. The largest shock was the 5.1 MBN (MSZ= 4.7) that occurred in northern Kentucky (near the town of Sharpsburg) on July 27, 1980. The U. S. Geological Survey location for that shock (page 16) listed arrival times from 153 stations at epicentral distances ranging from 2.3 degrees to 145.2 degrees. Additionally, the Virginia Tech Seismological Observatory and a Teledyne Geotech/University of Michigan research team each conducted special locational studies for this shock. Figure 5 is an epicenter map for the report period, while Figure 6 is a cumulative epicenter map for the 3.5 year period from July 1, 1977, through December 31, 1980. NOTICES I. South Carolina Seismic Report A report titled: South Carolina Seismic Program, Seismological Data Report, Selected Events-March 1973-December 1977 and Network Events-January 1978-July 1980 and dated 1981 is available as USGS Open-File Report 81-362. Copies may be purchased from: Open-File Services Section Branch of Distribution U. S. Geological Survey DFC, Box 25425 Denver, Colorado 80225 Prepayment is required. Price information will be published in the monthly listing "New Publications of the Geological Survey." For additional information call: Commercial (303) 234-5888, FTS 234-5888. II. Tennessee Preliminary Seismological Bulletins The Tennessee Earthquake Information Center (TEIC) has initiated publication of a Preliminary Seismological Bulletin series with Volume 1, Number 1, covering the month of October, 1980. The most recent issue received by the editors of this Bulletin was Volume 2, Number 2, covering the month of February, 198l. In addition to conventional bulletin items (station coordinates, hypocenter parameters, arrival-time data, etc.) some of the TEIC bulletins include special reports. For example: Vol. 2, No. 1, contained Special Report #3-Ridgeley, Tennessee Earthquake Swarms, 02-06 January 1981 by J. E. Zollweg. Information concerning this seismological bulletin series can be obtained from: Dr. Arch Johnston, Director Tennessee Earthquake Information Center Memphis State University Memphis, Tennessee 38152 Telephone: (901) 454-2007 III. Kentucky Earthquake of July 27, 1980 - Reconnaissance Report See page 23 in this Bulletin. ACKNOWLEDGMENTS In addition to the support furnished by the host institutions of the network members, 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 National Science Foundation - Geophysics Program, The Nuclear Regulatory Commission - Office of Reactor Safety Research, The United States Geological Survey - Office of Earthquake Studies, The Department of Energy, The Georgia Power Company, The Virginia Electric and Power Company. TABLE 1 LIST OF OPERATING SEISMIC STATIONS BY STATE JULY - DECEMBER, 1980 STA LATITUDE LONGITUDE ELEVATION ID DEG. (N) DEG. (W) METERS LOCALITY OPERATOR FLORIDA GAI 29.6458 82.3394 51 GAINESVILLE, FL UFL GEORGIA AMG 32.0594 84.2177 122 AMERICUS, GA GSW ATL 33.4333 84.3375 272 ATLANTA, GA GIT BEV 34.0893 82.7334 158 CLARK HILL RES GIT CDG 34.6108 84.6629 332 CARTERS DAM GIT CH5 33.7332 82.3118 114 CLARK HILL RES GIT CH6 33.8938 82.5291 130 CLARK HILL RES GIT EP1 33.9514 82.5136 134 CLARK HILL RES GIT ETG 33.2912 83.3507 137 WALLACE DAM, GA GIT GBG 33.4994 83.2112 174 WALLACE DAM, GA GIT IVA 34.2721 82.7460 168 CLARK HILL RES GIT LDV 34.1479 82.6833 162 CLARK HILL RES GIT REG 33.4421 83.3371 178 WALLACE DAM, GA GIT RMG 34.3359 85.3160 337 RCKY MTN NET GIT SMG 34.3495 85.3463 314 RCKY MTN NET GIT TVG 34.3771 85.3023 323 RCKY MTN NET GIT WDG 33.3451 83.1760 183 WALLACE DAM, GA GIT NORTH CAROLINA AVNC 35.624 82.531 ASHEVILLE, NC TEIC CEH 35.8908 79.0928 CHAPEL HILL, NC UNC RNC 35.63 78.98 85 RALEIGH, NC CPL SOUTH CAROLINA BCS 32.9812 80.0717 12 BAPTIST COLLEGE USGS BOW 33.3736 80.6431 35 BOWMAN USGS CCS 32.8162 80.2553 9 CAWCAW SWAMP USGS CHF 34.0247 82.5867 152 CALHOUN FALLS USGS COW 33.3842 80.7008 33 COW CASTLE CR USGS HBF 32.9330 80.3780 10 HARTS BLUFF USGS JSC 34.2790 81.2580 120 JENKINSVILLE USGS LHS 34.4790 80.8080 120 LIBERTY HILL USGS MGS 32.8970 80.1408 9 MIDDLETON GDNS USGS MTT 33.7513 81.6362 182 MONETTA USGS MR01 34.3319 81.2957 131 MONTICELLO RSVR SCEG MR02 34.1930 81.2301 84 MONTICELLO RSVR SCEG MR03 34.3514 81.4569 125 MONTICELLO RSVR SCEG MR04 34.4287 81.2166 145 MONTICELLO RSVR SCEG MR05 34.2675 81.3342 103 MONTICELLO RSVR SCEG MR06 34.3517 81.1962 137 MONTICELLO RSVR SCEG MR07 34.3705 81.3250 134 MONTICELLO RSVR SCEG MR08 34.4088 81.4092 112 MONTICELLO RSVR SCEG MR09 34.3008 81.4030 122 MONTICELLO RSVR SCEG MR10 34.3363 81.3375 137 MONTICELLO RSVR SCEG NHS 33.0720 79.7560 10 NORTH HAMPDEN USGS 0SB 33.5472 80.8444 91 ORANGEBURG USGS PBS 33.279 80.264 25 PIDGEON BAY USGS PPS 32.8237 80.0400 4 PIERPONT USGS PRM 34.0833 82.3633 254 PARSONS MTN USGS ROW 33.3650 80.7944 35 ROWESVILLE USGS SGS 33.1930 80.5120 25 ST. GEORGE USGS SMT 34.9308 82.9710 498 SMELTZER MTN USC SRPD 33.1550 81.7125 31 SAVANNAH RVR LAB DUP SRPN 33.3290 81.5888 95 SAVANNAH RVR LAB DUP SRPW 33.2023 81.5782 77 SAVANNAH RVR LAB DUP SVS 32.9688 80.2487 3 SLANDSVILLE USGS VSC* 32.8790 81.0500 30 VARNEVILLE USGS WMS 33.4358 80.7408 34 W. MIDDLE SCHOOL USGS ZIN 33.1072 80.1628 30 MT ZION CHURCH USGS (*VSC moved--becomes VRN with provisional coord; 33.0375, 80.9417) TENNESSEE HPK 35.926 83.879 305 KNOXVILLE, TN GIT/TEIC HWR 35.758 83.938 311 MARYVILLE, TN TEIC LGAR 34.6514 90.6581 107 LA GRANGE, TN TEIC ORT 35.9095 84.3048 370 OAK RIDGE, TN UCC PGM 34.4667 90.1167 TEIC SFTN 35.3575 90.0188 -23 SHELBY FOREST, TN TEIC TKL 35.6581 83.7742 350 TUCKALEECHEE CNVS, TN TEIC TSTN 35.6766 83.7040 341 TOWNSEND, TN TEIC VIRGINIA BAV 37.2220 80.4250 622 BLACKSBURG, VA VPI BLA 37.2114 80.4211 634 BLACKSBURG, VA VPI BV1 38.1781 79.6611 768 BATH COUNTY, VA VPI BV2 38.1367 79.9194 610 BATH COUNTY, VA VPI BV3 38.2383 79.7667 750 BATH COUNTY, VA VPI CBN 38.2050 77.3733 70 CORBIN, VA USGS CNV 38.2050 77.3733 70 CORBIN, VA VPI CVL 37.9813 78.4608 167 CHARLOTTESVLE, VA VPI CVV 37.9814 78.4608 167 CHARLOTTESVLE, VA DMR FRV 37.2030 78.3593 216 FARMVILLE, VA VPI FTV 38.8661 78.1688 341 FRONT ROYAL, VA DMR GHV 37.7942 78.1073 107 GOOCHLAND, VA VPI LEX 37.7894 79.4417 311 LEXINGTON, VA WAL NAV 37.3166 80.7931 610 NARROWS, VA VPI NA2 38.1270 77.7470 82 NORTH ANNA, VA VPI NA5 37.9930 77.7470 76 NORTH ANNA, VA VPI NA11 37.9830 77.6850 84 NORTH ANNA, VA VPI NA12 37.9830 77.8795 125 NORTH ANNA, VA VPI PBV 36.9823 77.5312 49 PETERSBURG, VA VPI PUV 37.0257 80.8158 652 PULASKI, VA VPI VBV 36.7853 76.1080 46 VIRGINIA BEACH, VA TCC WEST VIRGINIA BV4 38.3572 79.8278 814 POCAHONTAS CO, WV VPI GBV 38.4321 79.8453 802 GREEN BANK, WV NASA HWV 37.5905 80.8408 521 HINTON, WV VPI MRG 39.6331 79.9544 281 MORGANTOWN, WV WVU PWV 37.3348 81.0488 820 PRINCETON, WV VPI OPERATOR CODE UNC - University of North Carolina CPL - Carolina Power and Light Company DMR - Virginia Division of Mineral Resources DUP - E. I. DuPont de Nemours and Company, Inc. GIT - Georgia Institute of Technology GSW - Georgia Southwestern College NASA - NASA/Goddard Space Flight Center SCEG - South Carolina Electric and Gas Company TCC - Tidewater Community College (Va) TEIC - Tennessee Earthquake Information Center USGS - United States Geological Survey UCC - Union Carbide Corporation UFL - University of Florida USC - University of South Carolina VPI - Virginia Tech WAL - Washington and Lee University WVU - West Virginia University TABLE 2 LIST OF LOCATED SOUTHEASTERN UNITED STATES EARTHQUAKES FOR THE TIME PERIOD 1 JULY 1980 THROUGH 30 DECEMBER 1980 1 JULY 1980 BOWMAN, SOUTH CAROLINA MLD= 1.6 (USGS) *USGS LAT= 33.380N LONG= 80.673W H= 23-33-19.8 DPTH= 2.0 KM (NO= 15, RMS RES= 0.11 SEC, GAP= 127 DEG, ERH= 1.0 KM, ERZ= 0.9 KM, Q= B) (HYPOELLIPSE Semi-Axes (length in km, azimuth in deg): horizontal is 0.4, -61; 1.0, 29 and vertical is 0.9 km. HYPOELLIPSE Quality= A) STA DIST (KM) AZ (DEG) PHASE TIME RES (SEC) COW 2.6 271 IPD 23-33-20.85 0.06 ES 23-33-21.51 0.04 BOW 2.8 99 IPD 23-33-20.55 -0.17 WMS 8.2 309 IPC 23-33-21.63 0.03 ES 23-33-22.97 0.14 ROW 11.4 262 IPC 23-33-22.27 -0.09 ES 23-33-23.61 -0.51 OSB 24.4 319 IPC 23-33-24.28 0.05 ES 23-33-27.24 -0.04 SGS 25.6 144 IPC 23-33-24.50 0.01 PBS 39.7 106 ES 23-33-31.85 0.23 MTT 98.4 295 ES 23-33-48.35 0.03 JSC 113.4 331 ES 23-33-52.00 -0.37 27 JULY 1980 SHARPSBURG, KENTUCKY MBN= 5.1 (37 obs), MSZ= 4.7 (2 obs) *USGS LAT= 38.174N LONG= 83.907W H= 18-52-00.0 DPTH= 8.0 KM (Two people injured and considerable damage reported. Maximum intensity VII at Maysville, Kentucky. Felt in 15 states and parts of southern Ontario, Canada. MBN= 5.0 (PAL), 5.2 (TUL) DIST AZ RES STA (DEG) (DEG) PHASE TIME (SEC) MAG BLO 2.28 297 PD 18-52-59.4 - 0.9 AN10 2.34 349 IPC 18-52-59.7 - 1.4 ORT 2.28 188 EPD 18-52-59.8 - 0.6 AN11 2.46 346 IPC 18-53-01.0 - 1.9 TKL 2.51 178 IPC 18-53-02.2 - 1.4 HWV 2.50 103 P 18-53-02.5 - 0.9 AN9 2.57 350 IPC 18-53-03.0 - 1.5 NAV 2.61 108 P 18-53-04.0 - 1.1 BLA 2.93 108 IPND 18-53-08.5 - 1.1 ISN 18-53-43.8 BV2 3.14 89 P 18-53-11.2 - 1.4 BV1 3.35 89 P 18-53-14.2 - 1.4 MRG 3.41 63 IPC 18-53-14.8 - 1.6 UTO 3.49 4 IPC 18-53-16.9 - 0.6 CDG 3.61 190 PC 18-53-17.9 - 1.3 BPIL 3.69 272 P 18-53-19.0 - 1.4 RMG 3.96 197 PC 18-53-23.4 - 0.7 AAM 4.13 3 IPC 18-53-24.3 - 2.2 WCK 4.14 254 P 18-53-24.6 - 2.1 CHF 4.28 165 P 18-53-26.0 - 2.7 PRM 4.27 163 EP 18-53-26.3 - 2.3 ELC 4.31 260 EP 18-53-26.9 - 2.3 CVV 4.30 91 P 18-53-27.4 - 1.7 CRU 4.37 250 P 18-53-27.9 - 2.1 CH6 4.43 165 PD 18-53-28.1 - 2.8 FRV 4.51 101 P 18-53-29.3 - 2.6 GHV 4.60 93 P 18-53-30.7 - 2.5 PWLA 4.62 228 IPN 18-53-31.2 - 2.4 DWM 4.65 255 P 18-53-31.6 - 2.3 REG 4.74 174 PC 18-53-31.7 - 3.7 CH5 4.61 163 PD 18-53-31.8 - 1.7 CHI 4.69 324 P 18-53-32.5 - 2.1 MTT 4.78 157 P 18-53-32.6 - 3.3 GBG 4.70 173 PC 18-53-32.8 - 1.9 ETG 4.89 175 PC 18-53-34.0 - 3.4 DON 4.88 260 P 18-53-34.7 - 2.6 NA2 4.86 89 P 18-53-34.8 - 2.2 LST 4.91 252 P 18-53-35.1 - 2.6 DLA 5.01 20 P 18-53-36.7 - 2.3 OSB 5.24 151 P 18-53-38.1 - 4.3 PBV 5.20 101 P 18-53-38.3 - 3.5 FVM 5.15 270 EPD 18-53-38.6 - 2.4 RMB 5.22 258 P 18-53-39.1 - 3.0 ECD 5.26 248 P 18-53-39.2 - 3.5 TYS 5.25 276 P 18-53-39.2 - 3.3 LDN 5.28 22 P 18-53-39.5 - 3.4 ELF 5.39 21 P 18-53-40.9 - 3.5 BOW 5.48 150 P 18-53-41.5 - 4.2 ROW 5.42 151 P 18-53-41.5 - 3.5 SGS 5.69 150 P 18-53-44.0 - 4.6 SFTN 5.65 242 EPN 18-53-45.3 - 2.9 ZIN 5.90 148 P 18-53-46.0 - 5.7 PGA 5.76 251 P 18-53-46.1 - 3.6 HBF 5.97 150 P 18-53-47.8 - 4.8 JHP 5.88 246 P 18-53-49.0 - 2.3 WLA 6.23 243 IPN 18-53-53.6 - 2.7 LG 18-55-34.0 LGAR 6.48 239 EPN 18-53-56.0 - 3.8 OLY 6.62 249 EPN 18-53-57.2 - 4.7 GPD 7.83 66 EP 18-54-13.5 - 5.2 SHA 8.24 206 P 18-54-21.8 - 2.7 GBO 9.31 259 IPND 18-54-22.4 -17.0 ECT 8.84 62 EP 18-54-27.8 - 5.1 RLO 9.10 261 IPND 18-54-31.0 - 5.4 FHO 9.26 36 EP 18-54-32.0 - 6.6 OTT 9.45 38 P 18-54-36.0 - 5.2 TUL 9.77 260 IPND 18-54-39.5 - 6.1 7.6X ESN 18-56-25.6 ESG 18-57-25.1 LZ NSC 9.84 67 EP 18-54-39.7 - 7.0 MIQ 10.08 33 P 18-54-43.0 - 6.8 SIO 10.21 260 EPNC 18-54-45.8 - 6.0 FLR 10.43 66 EP 18-54-47.9 - 6.9 HNH 10.38 54 EP 18-54-48.5 - 5.5 WES 10.49 62 EP 18-54-48.9 - 6.7 MNT 10.60 43 EPD 18-54-51.0 - 6.0 PCO 10.50 266 EPNC 18-54-51.0 - 4.7 ESG 18-57-48.5 WLO 11.63 253 EPN 18-55-05.6 - 5.5 7.3X (S) 18-58-46.0 GNT 11.82 43 P 18-55-08.0 - 5.6 RRO 11.90 261 EPND 18-55-08.3 - 6.4 ACO 12.21 268 EPND 18-55-13.1 - 5.8 HKT 12.84 234 EP 18-55-20.1 - 7.2 MIM 13.15 53 EP 18-55-27.0 - 4.5 POC 13.70 43 (P) 18-55-33.0 - 5.6 EMM 13.94 57 EP 18-55-36.7 - 5.1 EBS 14.64 303 P 18-55-42.3 - 8.7 JRTX 14.82 254 EP 18-55-46.8 - 6.8 LUB 15.26 258 EP 18-55-52.5 - 6.8 JCT 15.20 244 IP 18-55-53.0 - 5.4 5.0 MNQ 16.38 36 P 18-56-07.0 - 6.6 GLD 16.65 282 EPC 18-56-11.1 - 6.2 GOL 16.77 282 EPC 18-56-12.1 - 6.7 MSA 17.59 273 EP 18-56-24.5 - 4.8 MOT 18.17 252 IP 18-56-32.0 - 4.3 LD3 18.62 304 EP 18-56-34.2 - 7.3 ALQ 18.39 267 EPC 18-56-35.1 - 3.9 4.5 BDW 20.02 291 EP 18-56-53.7 - 4.5 SCH 20.30 29 EP 18-56-56.0 - 4.7 5.5 DCI 21.25 294 E(P) 18-57-04.7 - 6.1 YMC 21.29 297 EP 18-57-08.0 - 3.2 BEI 21.63 289 E(P) 18-57-12.0 - 2.6 GCA 21.95 275 EPC 18-57-16.5 - 1.3 CMT 22.24 301 IPC 18-57-18.1 - 2.5 HRF 22.33 301 EP 18-57-18.3 - 3.2 DUG 22.46 284 E(P) 18-57-20.0 - 2.8 BUT 22.57 299 EP 18-57-21.7 - 2.3 TUC 22.68 263 EP 18-57-22.8 - 2.2 LPS 24.24 192 EP 18-57-35.5 - 4.8 EUR 24.95 283 IP 18-57-45.5 - 1.7 GLR 25.37 278 EP 18-57-49.5 - 1.6 GLA 25.58 268 EP 18-57-51.0 - 2.0 BMN 25.79 286 EP 18-57-51.8 - 3.2 NEW 26.04 304 EP 18-57-53.5 - 3.6 PAS 27.86 272 EP 18-58-12.0 - 1.8 ELG 19-06-58.0 ESCS 19-09-00.0 JAS 28.65 281 EPC 18-58-17.9 - 3.0 LON 29.01 299 IP 18-58-21.9 - 2.3 4.3 WKR 29.21 277 EP 18-58-22.3 - 3.8 PRI 29.25 277 EP 18-58-23.0 - 3.5 ARN 29.63 280 EP 18-58-27.0 - 2.8 MHC 29.71 280 EP 18-58-28.0 - 2.7 YKA 30.71 332 P 18-58-35.1 - 3.9 BOG 34.58 163 EP 18-59-15.0 1.4 RES 36.97 355 EP 18-59-29.0 - 3.8 4.6 PSO 37.30 169 EP 18-59-38.5 1.9 INK 40.42 334 P 18-59-57.0 - 4.6 HQN 40.52 320 EP 18-59-59.3 - 3.3 ALE 45.03 4 IPC 19-00-35.5 - 3.7 5.2 COL 45.20 327 EP 19-00-37.0 - 3.6 FBA 45.20 327 EPC 19-00-37.0 - 3.6 4.8 PMR 45.69 323 EPC 19-00-41.7 - 2.9 5.0 AKU 46.05 32 IP 19-00-45.7 - 1.6 6.3X DAG 47.53 16 IPC 19-00-55.2 - 3.8 5.6 KDC 47.64 317 EP 19-00-57.2 - 2.8 TTA 48.85 325 EPC 19-01-05.8 - 3.6 SVW 48.84 322 EPC 19-01-05.9 - 3.5 HUA 50.59 169 E(P) 19-01-21.1 - 2.5 SDN 52.44 315 EP 19-01-33.1 - 3.7 EKA 54.72 44 PC 19-01-50.5 - 3.1 5.1 LPB 56.40 162 P 19-02-03.0 - 3.6 4.9 BER 57.35 36 EP 19-02-08.2 - 4.3 LPF 58.54 51 EP 19-02-17.0 - 3.9 5.0 GRR 58.51 51 EP 19-02-17.1 - 3.6 5.1 FLN 58.59 50 EP 19-02-17.7 - 3.6 5.3 SSC 58.89 50 EP 19-02-19.6 - 3.8 5.3 TRO 58.99 23 IP 19-02-19.6 - 4.2 KON 59.62 36 IP 19-02-23.8 - 4.5 NAO 59.69 34 P 19-02-25.4 - 3.4 5.1 TOL 60.01 61 EP 19-02-28.0 - 3.3 LFF 60.95 54 EP 19-02-33.9 - 3.7 5.3 DOU 61.05 47 P 19-02-35.4 - 2.7 E 19-02-39.1 HFS 61.27 34 IP 19-02-35.6 - 3.9 5.3 LZ 4.6 RJF 61.29 53 EP 19-02-35.7 - 4.2 4.8 TCF 61.28 52 EP 19-02-35.9 - 4.0 5.4 KEV 61.38 22 IPC 19-02-36.4 - 3.7 I 19-02-40.4 LPO 61.35 54 EP 19-02-36.4 - 3.9 5.2 WTS 61.47 45 EP 19-02-37.5 - 3.5 E 19-02-41.5 MZF 61.55 52 EP 19-02-37.6 - 4.1 5.2 HEE 61.50 46 EP 19-02-38.0 - 3.2 E 19-02-41.5 EPF 61.55 56 EP 19-02-38.4 - 3.4 5.5 AVF 61.77 51 EP 19-02-38.6 - 4.5 5.2 SSF 61.74 51 EP 19-02-38.8 - 4.1 5.5 CAF 61.80 54 EP 19-02-39.7 - 3.7 LOR 61.86 51 EP 19-02-39.7 - 4.1 5.2 LBF 62.06 51 EP 19-02-40.9 - 4.3 5.3 SMF 62.13 51 EP 19-02-41.1 - 4.5 4.8 MAL 61.19 64 IP 19-02-43.0 3.7 4.2 MLS 62.07 56 EP 19-02-43.5 - 1.7 SOD 62.58 24 IP 19-02-43.8 - 4.4 I 19-02-47.6 HAU 63.02 49 EP 19-02-47.6 - 3.8 5.3 UPP 63.14 34 IP 19-02-47.7 - 4.3 I 19-02-51.6 TNS 63.20 46 EP 19-02-49.0 - 3.6 BSF 63.36 49 EP 19-02-49.8 - 3.9 4.9 CDF 63.38 48 EP 19-02-50.0 - 3.9 5.2 BAO 63.25 141 E(P) 19-02-52.0 - 1.3 ZUL 64.48 49 EP 19-02-57.0 - 4.1 DIX 64.58 50 EP 19-02-57.5 - 4.5 KJF 64.77 27 IPC 19-02-58.5 - 4.1 5.5 I 19-03-02.8 CLL 65.19 43 EP 19-03-01.0 - 4.5 5.4 E 19-04-11.0 HOF 65.08 45 IPD 19-03-01.6 - 3.3 MOX 64.77 44 EP 19-03-03.0 0.2 5.6 E 19-03-13.5 LZ 4.8 LE GRF 65.02 46 EP 19-03-04.0 - 0.5 5.6 NUR 65.75 31 IP 19-03-05.6 - 3.3 5.3 I 19-03-11.0 OGA 66.34 48 EP 19-03-10.0 - 3.1 PRU 66.71 44 PD 19-03-12.2 - 3.1 LN LE LH 4.5X KHC 66.63 45 P 19-03-16.5 1.6 VKA 68.63 45 EP 19-03-22.0 - 5.4 LJU 68.84 48 EP 19-03-29.0 0.3 KRA 69.58 42 EP 19-03-29.1 - 4.0 I 19-03-33.0 SRO 69.99 45 EP 19-03-37.0 1.3 SPC 70.24 43 EP 19-03-38.1 0.6 MDZ 72.07 167 E(P) 19-03-47.6 - 0.8 SKO 75.25 48 IP 19-04-07.0 0.1 MLR 75.57 43 EP 19-04-09.0 0.2 VAV 76.32 48 EP 19-04-09.8 - 3.1 KIC 77.59 92 (E)P 19-04-21.5 1.1 WRA 142.28 288 PKP 19-11-48.2 - 1.7 WB2 142.27 288 PKP 19-11-48.3 - 1.6 MAW 145.20 158 PKP 19-11-57.0 - 3.4 ADDITIONAL DATA DATE DIST AZ STA (MO-DAY) (KM) (DEG) PHASE TIME RNC 0727 521.2 121 P 18-53-31.5 NOTE: Following is a special locational effort for the 27 July 1980 Kentucky earthquake by the Virginia Tech Seismological Observatory. A new regional crustal velocity model (Carts, D. A. and G. A. Bollinger, 1980, EQKE NOTES, vol. 51, No. 3, pp. 15-16) was used with the HYPO71 program. *VPI LAT= 38.198N LONG= 83.933W H= 18-52-20.9 DPTH= 4.0 KM (NO STA= 40, RMS= 0.36 SEC, ERH= 1.0 KM, ERZ= 4.6 KM, DMIN= 250 KM, GAP= 62 DEG, Q= D) STA DIST (KM) AZ (DEG) P TIME (UTC) RES (SEC) BLO 249.8 296 18-52-59.4 0.56 ORT 256.1 187 18-52-59.8 0.18 AN10 256.7 350 18-52-59.7 0.01 AN11 270.4 346 18-53-01.0 -0.38 HWV 280.2 104 18-53-02.5 -0.09 TKL 282.3 177 18-53-02.2 -0.64 AN9 283.1 350 18-53-03.0 0.05 NAV 293.4 110 18-53-04.0 -0.21 BLA 328.6 109 18-53-08.5 -0.06 BV2 351.6 91 18-53-11.2 -0.20 BV1 374.2 90 18-53-14.2 0.02 MRG 380.1 65 18-53-14.8 -0.11 CDG 403.6 189 18-53-17.9 0.09 RMG 441.9 196 18-53-23.4 0.87 AAM 456.0 3 18-53-24.3 0.03 WCK 458.4 252 18-53-24.6 0.04 ELC 477.8 258 18-53-26.9 -0.05 PRM 478.3 163 18-53-27.7 0.68 CHF 478.7 165 18-53-27.4 0.33 CVV 480.6 93 18-53-28.8 1.50X CRO 484.3 248 18-53-27.9 0.15 CH6 494.4 165 18-53-29.5 0.51 FRV 503.8 103 18-53-30.7 0.53 GHV 513.7 95 18-53-32.1 0.72 CH5 516.6 164 18-53-33.2 1.47X GBG 525.5 173 18-53-34.2 1.37X REG 530.5 174 18-53-33.1 -0.35 MTT 535.1 157 18-53-34.3 0.26 DON 541.2 258 18-53-34.7 -0.07 NA2 541.9 91 18-53-36.2 1.34X LST 546.0 250 18-53-35.1 -0.26 ETG 547.0 174 18-53-35.4 -0.09 FVM 570.0 268 18-53-38.8 0.27 RMB 579.7 255 18-53-39.1 -0.42 PBV 581.3 103 18-53-39.7 -0.01 ECD 584.4 246 18-53-39.2 -0.89 OSB 586.6 152 18-53-39.8 -0.59 ROW 606.7 152 18-53-43.2 0.33 BOW 612.4 151 18-53-43.2 -0.37 SFTN 628.0 240 18-53-45.3 -0.17 SGS 635.9 151 18-53-45.7 -0.76 HBF 667.2 151 18-53-49.5 -0.82 LGAR 720.3 237 18-53-56.0 -0.86 SHA 917.8 205 18-54-21.8 0.59X OTT 1051.3 41 18-54-36.0 -1.67X TUL 1084.4 256 18-54-39.5 -2.25X NOTE: Following is a special locational effort for the 27 July 1980 Kentucky earthquake by a Teledyne Geotech/University of Michigan research team. A velocity model for the Anna, Ohio, region by F. J. Mauk and others (Geophysical Investigations at the Anna, Ohio, Earthquake Zone, Annual Report, July-1979 - June 1980, U. S. NUREG Report, 1980, 259 p.) was used with the FASTHYPO program of R. B. Herrmann, EARTHQUAKE NOTES, 1979, vol. 50, pp. 25-37). *GEOTECH/UM LAT= 38.18N LONG= 83.94W H= 15-52-21.7 DPTH= 15.5 KM (NO STA= 33, ERROR ELLIPSE DATA (95 percent confidence); (Semi-major axis: Length= 0.56 km, azimuth= 87.9 deg; Semi-minor axis: Length= 0.46 km, vertical semi-axis: 2.6 km) P SEC AFTER STA DIST (KM) AZ (DEG) 18-52 UTC RES (SEC) DON 540.6 258 94.60 0.02 BEV 466.3 166 85.20 -0.15 LDV 461.0 165 84.70 0.00 ETG 544.7 174 94.60 -0.48 CDG 401.2 189 77.50 0.24 AN9 285.6 350 62.70 -0.20 AN10 259.0 349 59.50 -0.10 AN11 270.7 346 61.00 -0.05 AN8 231.5 352 56.40 0.23 AN1 256.1 356 59.30 0.06 AN3 263.6 2 60.30 0.14 AAM 458.4 2 84.30 -0.07 HWV 279.9 103 62.40 0.20 BLA 328.0 109 68.40 0.23 GHV 513.9 94 90.80 -0.46 NAV 292.9 109 64.00 0.19 NA2 542.5 90 94.50 -0.32 BV1 374.6 89 74.00 0.04 BV2 352.1 90 71.20 0.04 FVM 569.8 267 98.55 0.34 ELC 476.8 258 86.90 0.24 WCK 457.6 252 84.70 0.43 CRU 483.3 248 87.60 0.14 TYS 581.0 273 99.25 -0.34 LST 545.3 250 95.20 0.04 RMB 578.6 255 99.00 -0.29 CCMO 573.3 276 98.50 -0.14 BAV 327.3 108 68.40 0.32 DMMO 539.5 252 94.15 -0.28 EBZ 589.8 235 100.50 -0.18 PIV11 98.6 106 37.50 -0.05 PIV33 97.2 116 37.40 0.05 PWLA 512.2 226 91.20 0.15 NOTE: An Earthquake Engineering Research Institute (EERI) Report, dated September, 1980, and titled "Reconnaissance Report, Northern Kentucky Earthquake," July 27, 1980, is available from: Earthquake Engineering Research Institute, 2620 Telegraph Avenue, Berkeley, California 94704. 31 JULY 1980 SHARPSBURG, KENTUCKY AFTERSHOCK MBN= 2.5 (USGS) *USGS LAT= 38.198N LONG= 83.922W H= 09-26-56.3 DPTH= 13.0 KM (Felt at Sharpsburg and in the Bethel-Sherburne area) STA DIST (DEG) AZ (DEG) PHASE TIME RES (SEC) ORT 2.30 188 EP 09-27-34.0 -0.6 AN4 2.02 1 P 09-27-35.5 5.1 ES 09-28-01.4 AN8 2.06 352 P 09-27-35.8 4.8 AN10 2.31 350 P 09-27-39.7 5.1 HWV 2.51 103 EP 09-27-42.1 4.6 ES 09-28-12.9 NAV 2.63 109 EP 09-27-43.3 4.1 ES 09-28-15.4 BLA 2.95 108 E(P) 09-27-45.0 1.3 PUV 2.73 114 EP 09-27-46.6 6.0 ES 09-28-19.8 BV1 3.36 89 EP 09-27-54.3 4.8 ES 09-28-29.1 PWLA 4.63 227 E(P) 09-28-10.3 2.8 ADDITIONAL DATA STA PHASE TIME MBN HWV EP 09-27-42.2 2.5 ES 09-28-13.0 PWV ES 09-28-11.2 2.9 NAV EP 09-27-43.5 2.6 IS 09-28-16.4 BLA ES 09-28-25.8 2.6 PUV EP 09-27-46.6 2.6 IS 09-28-19.8 BV2 IS 09-28-30.6 BV1 EP 09-27-54.3 2.6 ES 09-28-29.1 23 AUGUST 1980 KENTUCKY MBN= 3.1 (SLM) *USGS LAT= 37.995N LONG= 84.922W H= 03-49-02.5 DPTH= 5.0 KM, FXD (STD DEV RES= 1.3 SEC (7 obs)) (FELT (III) at Bethlehem, Cropper and Orville. Also felt at Frankfort.) STA DIST (DEG) AZ (DEG) PHASE TIME RES (SEC) ORT 2.14 166 EP 03-49-40.0 0.6 AN11 2.57 4 P 03-49-44.3 - 1.2 P 03-49-47.5 S 03-50-22.3 TKL 2.51 158 P 03-49-44.7 0.1 AN7 2.94 16 P 03-49-52.6 1.8 AN12 2.98 11 P 03-49-54.3 3.0X HWV 3.26 96 P 03-49-54.3 - 1.0 S 03-50-36.3 ELC 3.49 260 IP 03-49-58.1 - 0.4 PWLA 3.93 221 IP 03-50-04.9 0.1 IS 03-50-53.0 LGAR 5.71 236 EP 03-50-46.6 16.6X 25 AUGUST 1980 SHARPSBURG, KENTUCKY AFTERSHOCK MBN= 2.5 (TEIC) *USGS LAT= 38.200N LONG= 83.910W H= 11-41-36.9 DPTH= 13 KM (Felt (IV) at Sharpsburg and Sherburne. Also felt at Owingsville.) STA DIST (DEG) AZ (DEG) PHASE TIME RES (SEC) AN4 2.02 0 IP 11-42-11.5 0.5 AN1 2.23 356 IP 11-42-15.9 1.8 ORT 2.31 188 EP 11-42-16.0 0.8 AN10 2.31 349 P 11-42-16.9 1.7 AN11 2.44 346 P 11-42-17.1 0.2 AN3 2.35 2 IP 11-42-17.4 1.7 AN12 2.73 356 P 11-42-21.2 0.1 BLA 2.94 109 E(P) 11-42-23.0 -1.1 PWLA 4.64 227 IP 11-42-48.3 0.1 1 SEPTEMBER 1980 MIDDLETON PLACE, SOUTH CAROLINA MLD= 2.9 (USGS), 2.6 (SRPN) *USGS LAT= 32.978N LONG= 80.186W H= 05-44-42.2 DPTH= 7.0 KM (NO= 19, RMS RES= 0.13 SEC, GAP= 99 DEG, ERH= 0.9 KM, ERZ= 1.7 KM, Q= B) (HYPOELLIPSE semi-axes (length in km, azimuth in deg: horizontal is 0.6, -89; 0.9, 1 and vertical is 1.7 km. HYPOELLIPSE Quality= A.) STA DIST (KM) AZ (DEG) PHASE TIME RES (SEC) SVS 6.0 260 IPC 05-44-43.75 0.06 ES 05-44-44.15 -0.68X MGS 10.0 155 IPC 05-44-44.26 0.18 AIN 14.4 9 IPC 05-44-44.80 -0.02 HBF 18.7 254 IPC 05-44-44.85 -0.11 ES 05-44-46.80 -0.25 SGS 38.7 308 IPD 05-44-48.71 -0.10 TRK 41.3 67 IPC 05-44-48.96 -0.13 BOW 61.4 316 IPD 05-44-52.60 0.13 COW 65.6 313 EP 05-44-53.15 0.09 VRN 71.0 275 IPD 05-44-53.90 -0.05 ES 05-45-02.85 0.13 ROW 71.2 307 IPD 05-44-54.02 0.09 ES 05-45-02.75 0.05 WMS 71.8 314 EP 05-44-54.11 0.17 ES 05-45-02.86 0.15 OSB 88.0 316 IPC 05-44-56.47 -0.27 ES 05-45-06.55 -1.05X MTT 159.9 302 EP 05-45-07.40 0.04 ES 05-45-26.90 0.77X JSC 175.3 325 EP 05-45-09.15 0.12 ES 05-45-29.90 0.86X LHS 176.2 341 EP 05-45-08.80 -0.44X PRM 236.6 301 EP 05-45-16.70 0.22 ES 05-45-43.15 1.11X ADDITIONAL DATA STA PHASE TIME SRPN EP 05-45-04.0 S 05-45-21.1 SRPW EP 05-45-04.2 05-45-20.7 PBS EP 05-44-48.9 CH5 P 05-45-15.0 S 05-45-37.8 CH6 P 05-45-18.1 S 05-45-36.5 GBG P 05-45-25.0 S 05-45-57.2 REG P 05-45-25.9 S 05-45-56.0 TKL IP 05-45-43.6 ESN 05-46-30.8 Following is a listing of Piedmont (non-Charleston seismic zone) South Carolina events from July 1980-December 1980 reported by the United States Geological Survey, South Carolina Network. UTC= Coordinated Universal Time; MLD= duration magnitude; a, b and c are principal semi-axes of confidence ellipsoid; Tr= trend of semi-axis in degrees; Pl= plunge of semi-axis in degrees; %= confidence level; RMS= root mean square of residuals; NO OBS= number of observations used in hypocenter computation; GAP= largest azimuthal separation between seismograph stations; DM= distance to nearest station, in kilometers; Q= quality index. ORIGIN TIME (UTC) LAT LONG DPTH RMS (MO-DAY-HR-MIN) (N DEG) (W DEG) (KM) MLD (SEC) Q 07 02 18-18-57.7 34.094 82.913 4.4 1.9 0.30 D 07 07 06-21-48.3 34.046 82.524 1.5 1.7 0.17 C 07 11 19-52-43.3 34.021 82.768 0.1 2.0 0.47 D 07 21 20-57-34.7 34.039 82.708 0.0 2.2 0.41 D 07 22 20-17-32.7 33.650 82.525 4.4 2.1 0.67 D 07 29 01-10-22.7 34.351 81.364 1.3 3.2 0.35 D 08 22 20-08-22.3 34.022 82.590 0.2 1.8 3.58 D 08 28 19-43-20.8 34.102 82.628 1.3 1.8 0.55 D 09 04 19-58-37.9 34.024 82.561 0.6 2.0 0.35 D 09 10 19-49-46.4 34.122 82.947 12.7 2.5 1.26 D 09 24 20-02-37.9 34.292 83.305 0.2 2.4 3.07 D 09 26 16-41-19.0 33.694 79.753 4.8 1.60 D 09 30 20-26-06.3 34.069 82.769 2.9 0.52 D 10 01 22-24-09.7 34.091 80.521 7.9 2.1 3.85 D 10 02 21-29-03.0 33.968 82.057 3.5 1.9 0.08 D 11 08 20-49-54.0 33.726 80.865 3.5 2.2 1.82 D 10 13 19-48-08.0 34.034 82.626 4.3 2.2 D 10 14 00-12-17.2 34.049 82.544 3.7 1.3 0.42 D 10 16 22-07-41.2 33.699 82.209 11.8 2.0 0.82 D 10 27 20-53-44.9 34.025 82.568 1.9 1.9 0.17 D 10 30 02-19-05.9 33.970 82.500 0.6 2.1 0.31 C 10 30 22-21-30.4 34.000 82.053 0.5 2.1 0.02 D 11 03 21-45-42.5 34.025 82.566 1.6 1.8 0.35 D 11 08 20-52-14.7 34.032 82.562 0.0 2.1 0.07 D 11 19 16-47-33.8 34.217 82.676 0.2 1.9 0.53 D 11 20 16-19-15.3 34.720 82.106 4.1 2.0 0.81 D 12 15 17-06-31.6 33.726 82.453 5.0 1.6 1.01 D 12 16 17-40-07.8 34.786 82.622 3.8 2.5 0.31 D 12 16 21-39-17.3 33.563 82.299 8.4 2.2 0.08 D 12 17 18-59-10.2 34.788 82.645 3.6 2.3 0.30 D 12 17 21-45-21.2 34.059 82.630 11.2 2.1 0.48 D 12 27 08-40-26.7 34.346 81.330 6.6 2.5 0.71 D 12 30 21-02-06.5 34.044 82.555 0.2 2.2 0.43 D ERROR ELLIPSOID AXES NO GAP DM a(km)-Tr-Pl b(km)-Tr-Pl c(km)-Tr-Pl % OBS (DEG) (KM) 06.7-289-03 11.6-019-04 99.9-162-85 68 5 338 08.3-342-00 00.2-072-03 00.8-252-87 68 6 185 21.8-357-01 52.5-267-28 05.7-089-61 68 7 328 08.3-350-09 18.9-256-25 02.2-099-63 68 7 322 12.9-043-00 07.2-133-01 99.9-313-89 68 6 270 83 03.7-359-00 02.1-269-06 10.4-089-84 68 9 182 71 99.9-321-10 50.9-056-24 11.2-211-63 68 7 293 08.8-024-12 26.8-118-19 34.4-264-67 68 6 285 42.6-355-00 00.9-085-43 09.3-265-47 68 5 194 93.3-201-13 59.2-101-36 23.6-307-50 68 7 330 29.9-237-13 20.7-331-15 99.9-107-69 68 5 336 28.0-353-00 30.4-083-01 99.9-263-89 68 8 297 95 17.8-018-05 13.3-110-20 99.9-275-69 68 6 332 26.0-317-02 99.9-227-02 99.9-092-87 68 8 238 93 00.8-269-00 06.4-359-00 00.0-090-90 68 5 212 81 10.8-318-00 31.2-228-00 00.0-270-89 68 7 154 84 43.6-275-19 09.9-173-32 05.7-031-51 68 5 328 97 02.3-067-12 99.9-167-40 99.9-324-47 68 4 202 12.3-100-05 31.5-191-11 99.9-346-77 68 6 262 99.9-347-12 02.0-081-20 12.4-228-66 68 4 193 02.8-104-14 07.7-207-42 05.6-000-44 68 7 194 83 20.2-173-09 01.8-081-12 04.9-298-74 68 5 206 80 99.9-347-12 01.9-080-14 11.8-218-71 68 4 190 07.7-171-10 01.0-074-34 30.8-275-54 68 5 182 91 04.8-208-12 30.3-304-26 02.8-095-60 68 5 288 03.2-262-00 12.9-352-00 99.9-090-90 68 4 284 02.6-135-01 05.7-225-01 99.9-000-88 68 5 252 76 08.5-253-00 15.2-343-00 00.0-090-89 68 5 311 03.0-103-03 08.7-194-05 99.9-343-84 68 5 282 08.3-253-00 14.7-343-00 00.0-090-89 68 5 312 32.5-147-04 24.5-241-38 09.3-051-51 68 6 306 98 06.3-237-02 14.0-327-10 42.6-135-79 68 7 180 72 12.4-336-01 02.2-246-11 03.9-072-78 68 9 200 91 ADDITIONAL DATA DATE (MO-DAY) STA PHASE TIME MAG 0729 NAV EP 01-11-17.7 MBN= 2.6 (NAV) IS 01-11-50.6 ELG 01-11-56.4 HWV EP? 01-11-21.1 ELG 01-12-04.4 BLA EP? 01-11-16.2 MBN= 2.4 (BLA) ELG 01-11-55.2 PUV EP? 01-11-12.7 ELG 01-11-48.2 FRV EP? 01-11-38.2 E 01-12-20.5 SRPN EP 01-10-42.2 MLD= 2.8 (SRPN) S 01-10-54.6 SRPW EP 01-10-44.4 S 01-10-53.4 Following is a listing of hypocenters for Virginia and West Virginia earthquakes. These hypocenters were determined at the Virginia Tech Seismological Observatory using HYPOELLIPSE and arrival time data from the Virginia Tech Network. In the listing below, the hypocentral parameters are given first and then followed by a separate table for the solution quality (error ellipse semi-axes) measures. DATE ORIGIN LAT N LONG W DPTH (YR-MO-DAY) (UTC) (DEG) (DEG) (KM) MLD 800804 10-13-32.7 38.066 77.764 4.9 0.7 800921 10-02-46.3 38.175 80.070 3.1 1.4 800926 01-31-57.8 38.069 77.768 0.4 FXD 2.0 800926 05-04-15.7 38.078 77.717 4.5 0.1 801009 01-47-01.1 37.217 80.822 23.5 -0.2 801011 22-40-28.5 38.120 77.811 2.4 FXD 0.7 801014 01-20-04.6 37.078 80.230 11.0 1.7 801016 03-48-07.6 38.066 80.215 10.0 1.1 801105 21-48-14.7 38.178 79.902 3.8 2.8/FELT 801125 07-44-04.0 38.095 80.122 15.3 0.6 801202 07-47-38.2 37.418 80.538 12.2 0.4 DATE HOR SEMI-AXES VERT SEMI-AXIS (YR-MO-DAY) (KM, DEG) (KM, DEG) (KM) Q 800804 0.5, -131 0.7, - 41 1.6 A 800921 1.7, -114 3.1, - 24 3.3 B 800926 0.9, -122 1.3, - 32 52.3 D 800926 2.7, - 2 7.5, - 92 9.4 C 801009 2.3, - 50 7.2, 40 4.9 C 801011 0.8, 41 5.5, - 49 6.8 C 801014 1.1, - 77 2.0, 13 3.1 B 801016 0.9, -124 2.9, - 34 3.9 B 801105 0.4, -115 0.7, - 25 1.0 A 801125 2.8, -132 2.9, - 42 3.4 B 801202 2.0, - 39 3.2, -129 7.4 C ADDITIONAL DATA DATE DIST AZ (YR-MO-DAY) STA PHASE TIME (KM) (DEG) 801105 RNC P 21-48-58.2 294 164 S 21-49-34.3 MRG P 21-48-04.1 163 358 S 21-48-59.0 NOTE: U. S. Geological Survey hypocenter for the 801105 event (PDE No. 45-80) is as follows: LAT= 38.175N LONG= 79.901W H= 21-48-14.7 DPTH= 4 KM NO STA= 15 (Felt in Bath County, MBN= 2.8 (BLA)) Following is a listing of earthquakes recorded by the Savannah River Plant (SRP) Network, Aiken, South Carolina (E. I. DuPont de Nemours and Company, Inc.) during the report period. DATE MLD (MO-DAY) STA PHASE TIME (SRPN) 0801 SRPN EP 07-14-37.2 2.7 S 07-14-52.3 SRPW IP 07-14-40.5 S 07-14-54.1 0804 SRPN ES 07-48-21.6 2.7 S 07-48-41.1 SRPW EP 07-48-22.1 S 07-48-40.6 1115 SRPN EP 20-55-56.5 2.5 S 20-56-14.0 SRPW P? 20-55-58.2 SRPD P? 20-55-57.5 1116 SRPN EP 00-30-17.2 1.9 S 00-30-35.3 SRPW P? 00-30-17.5 SRPD P? 00-30-16.5