BULLETIN NO 10 TABLE OF CONTENTS Page Introduction 1 Southeastern United States Seismicity 10 List of Figures 1. Seismic Stations Operating During the Period January - June 1982 2 2. South Carolina Seismic Network 3 3. Virginia Tech Seismic Network 4 4. Georgia Tech Seismic Network 5 5. Alabama Seismic Network 6 6. Eastern Tennessee Seismic Network 7 7. Earthquake Epicenters for the Report Period 11 8. Earthquake Epicenters for the Period July 1977 - June 1982 12 List of Tables 1. Seismic Stations Operating During Report Period 13 2. Earthquakes During Report Period 16 Acknowledgments 37 Errata and Addenda 38 Appendix - Station Information 42 Seismic Stations in Alabama 42 Seismic Stations in Georgia 43 Seismic Stations in Mississippi 46 Seismic Stations in North Carolina 47 Seismic Stations in South Carolina 48 Seismic Stations in Tennessee 52 Seismic Stations in Virginia and West Virginia 54 Mailing List 55 INTRODUCTION This report is the tenth semi-annual BULLETIN OF SEISMICITY OF THE SOUTHEASTERN UNITED STATES. It covers the period January through June, 1982. 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, Georgia Southwestern College, Tennessee Earthquake Information Center of Memphis State University, South Carolina Electric and Gas Company, Tennessee Valley Authority, Union Carbide Corporation (Nuclear Division), United States Geological Survey, Virginia Division of Mineral Resources, Seismological Observatory of Virginia Polytechnic Institute and State University, Washington and Lee University and West Virginia University. Table 1 is a listing, by state, of the 108 stations operating during the period January-June, 1982. 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, 4, 5 and 6 show the South Carolina, Virginia, Georgia, Alabama and Eastern Tennessee Networks, respectively. Each of these networks has station spacings too small 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. Even-numbered BULLETINS normally have a Station Information Appendix that gives detailed information on the operator, seismograph types, response characteristics, recording formats, etc. However, because of the unusual length of this BULLETIN, only those stations that are new or have been changed or closed since the last BULLETIN are included in the Appendix herein. Odd-numbered BULLETINS have an Appendix that presents the detection and location capability of the SEUSSN. SOUTHEASTERN UNITED STATES SEISMICITY Figure 7 is an epicenter map for the report period, January 1 - June 30, 1982, while Figure 8 is a cumulative epicenter map for the 5 year period from July 1, 1977, through June 30, 1982. There were 39 earthquakes (0.3 _ M _ 3.4) located by SEUSSN in the southeastern United States during the first six months of 1982. Of those, 2 in Virginia and 1 in Tennessee were felt events. The activity was well distributed throughout the region: 4 in Alabama, 4 in Georgia, 1 in West Virginia, 6 in South Carolina, 14 in Tennessee and 10 in Virginia. TABLE 1 LIST OF OPERATING SEISMIC STATIONS BY STATE JANUARY - JUNE, 1982 STA LATITUDE LONGITUDE ELEVATION ID DEG. (N) DEG. (W) METERS LOCALITY OPERATOR ALABAMA BKA 33.6339 87.9690 122 KENNEDY GIT-GSA HGA 34.2602 85.8464 384 COLLINSVILLE GIT-GSA HVA 34.0264 86.7692 195 HANCEVILLE GIT-GSA MLA 32.7055 87.6936 55 SAWYERVILLE GIT-GSA OCA 34.6138 86.4352 250 OWENS CROSSROADS GIT-GSA PWLA 34.980 88.064 204 PICKWICK LAKE TEIC TDA 33.5417 86.0247 181 TALLADEGA GIT-GSA TSA 33.2561 87.0675 180 TANNEHILL STATE PARK GIT-GSA FLORIDA GAI 29.6458 82.3394 51 GAINESVILLE UFL GEORGIA AMG 32.0594 84.2177 106 AMERICUS GSW ATL 33.4333 84.3375 272 ATLANTA GIT BBG 34.874 83.811 1355 BRASSTOWN BALD TEIC BEV 34.0893 82.7334 158 CLARK HILL RESERVOIR GIT CDG 34.6108 84.6713 332 CARTERS DAM GIT CH5 33.7332 82.3118 114 CLARK HILL RESERVOIR GIT CH6 33.8792 82.5194 130 CLARK HILL RESERVOIR GIT CRG 34.6589 84.5821 422 CARTERS DAM GIT EP1 33.9514 82.5136 134 CLARK HILL RESERVOIR GIT IVA 34.2721 82.7460 168 CLARK HILL RESERVOIR GIT LDV 34.1479 82.6833 162 CLARK HILL RESERVOIR GIT RCG 34.975 85.348 468 ROCK CITY TEIC RMG 34.3359 85.3160 337 ROCKY MOUNTAIN NET GIT SMG 34.3495 85.3463 314 ROCKY MOUNTAIN NET GIT TVG 34.3771 85.3023 323 ROCKY MOUNTAIN NET GIT MISSISSIPPI PGM 34.4667 90.1167 105 PLEASANT GROVE TEIC NORTH CAROLINA BENN 35.565 81.661 878 BENN KNOB TEIC BRBC 35.739 82.286 1976 MT. MITCHELL TEIC CEH 35.8908 79.0928 152 CHAPEL HILL UNC GFM 36.111 81.807 1726 GRANDFATHER MOUNTAIN TEIC RBNC 35.357 82.986 1829 RICHLAND BALSAM TEIC RNC 35.63 78.98 85 RALEIGH 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 CREEK 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 GARDENS USGS MTT 33.7513 81.6362 182 MONETTA USGS MR01 34.3319 81.2957 131 MONTICELLO RESERVOIR SCEG MR02 34.1930 81.2301 84 MONTICELLO RESERVOIR SCEG MR03 34.3514 81.4569 125 MONTICELLO RESERVOIR SCEG MR04 34.4287 81.2166 145 MONTICELLO RESERVOIR SCEG OSB 33.5472 80.8444 91 ORANGEBURG USGS PBF 32.8628 79.7607 -68 PORCHER BLUFF USGS PBS 33.2790 80.2640 25 PIGEON BAY USGS PPS 32.8237 80.0400 4 PIERPONT USGS PRM 34.0833 82.3633 254 PARSONS MOUNTAIN USGS ROW 33.3650 80.7944 35 ROWESVILLE USGS SBK 32.5672 80.1803 -68 SEABROOK USGS SGS 33.1930 80.5120 25 ST GEORGE USGS SRPD 33.1550 81.7125 31 SAVANNAH RIVER LAB DUP SRPN 33.3290 81.5888 95 SAVANNAH RIVER LAB DUP SRPW 33.2023 81.5782 77 SAVANNAH RIVER LAB DUP SVS 32.9688 80.2487 3 SLANDSVILLE USGS TRK 33.1221 79.7778 10 TURKEY CREEK USGS VEW 32.7177 79.9415 -68 OCEANVIEW USGS VRN 33.0375 80.9417 30 VARNEVILLE USGS WMS 33.4358 80.7408 34 W MIDDLE SCHOOL USGS ZIN 33.1072 80.1628 30 MT ZION CHURCH USGS TENNESSEE BHT 35.847 84.945 826 BLOWHOLE TEIC CBT 35.5394 84.4206 357 CHRISTIANBURG GIT DCT 35.0542 84.4194 508 DUCKTOWN GIT EBZ 35.141 89.351 169 EBENEZER TEIC* ETT 35.326 84.455 588 ETOWAH TEIC GLT 36.362 86.498 159 GALLATIN VSCC/TEIC HPK 35.926 83.879 305 KNOXVILLE TVA/GIT/TEIC HWR 35.758 83.938 311 MARYVILLE TVA/TEIC MPH 35.123 89.932 94 MEMPHIS TEIC* ORT 35.9095 84.3048 370 OAK RIDGE UCC RCT 35.3453 84.6614 265 RICEVILLE GIT RHT 35.0781 84.8825 299 RED HILL GIT SFTN 35.3575 90.0188 -23 SHELBY FOREST TEIC* TKL 35.6581 83.7742 350 TUCKALEECHEE CAVERNS TEIC TLT 35.3011 84.2833 512 TELLICO PLAINS GIT UTM 36.290 88.941 108 UNIV. TN. MARTIN UTM/TEIC *In western Tennessee near the New Madrid Seismic Zone- not in southeastern United States VIRGINIA BAV 37.2220 80.4250 622 BLACKSBURG VPI BLA 37.2114 80.4211 634 BLACKSBURG VPI BV1 38.1781 79.6611 768 BATH COUNTY VPI BV2 38.1367 79.9194 610 BATH COUNTY VPI BV3 38.2383 79.7667 750 BATH COUNTY VPI CBN 38.2050 77.3733 70 CORBIN USGS CNV 38.2050 77.3733 70 CORBIN VPI CVL 37.9813 78.4608 167 CHARLOTTESVILLE VPI CVV 37.9814 78.4608 167 CHARLOTTESVILLE DMR FRV 37.2030 78.3593 216 FARMVILLE VPI FTV 38.8661 78.1688 341 FRONT ROYAL DMR GHV 37.7942 78.1073 107 GOOCHLAND VPI LEX 37.7894 79.4417 311 LEXINGTON WAL MSH 37.1150 80.4012 684 CHRISTIANSBURG VPI NAV 37.3167 80.7931 610 NARROWS VPI NA2 38.1270 77.7470 82 NORTH ANNA VPI NA5 37.9930 77.7470 76 NORTH ANNA VPI NA11 37.9830 77.6850 84 NORTH ANNA VPI NA12 37.9830 77.8795 125 NORTH ANNA VPI PBV 36.9823 77.5312 49 PETERSBURG VPI PUV 37.0235 80.8158 652 PULASKI VPI VBV 36.7853 76.1080 5 VIRGINIA BEACH TCC VWV 37.4660 80.3917 963 VA-WVA BORDER VPI WMV 37.1085 80.9705 1157 WALKER MOUNTAIN VPI WEST VIRGINIA BV4 38.3572 79.8278 814 POCAHONTAS COUNTY VPI GBV 38.43212 79.84531 802 GREEN BANK NASA HWV 37.5905 80.8408 521 HINTON VPI MRG 39.6331 79.9544 281 MORGANTOWN WVU PMW 37.5097 80.4308 976 PETERS MOUNTAIN VPI PWV 37.3348 81.0488 820 PRINCETON VPI OPERATOR CODE CPL - Carolina Power and Light Company, NC DMR - Virginia Division of Mineral Resources, VA DUP - E. I. DuPont de Nemours and Company, Inc., SC NASA - National Aeronautics and Space Administration/ Goddard Space Flight Center, WV GIT - Georgia Institute of Technology, GA GSA - Geological Survey of Alabama, AL GSW - Georgia Southwestern College, GA SCEG - South Carolina Electric and Gas Company, SC TCC - Tidewater Community College, VA TEIC - Tennessee Earthquake Information Center, TN TVA - Tennessee Valley Authority, TN UCC - Union Carbide Corporation, TN UFL - University of Florida, FL UNC - University of North Carolina, NC USGS - United States Geological Survey, CO UTM - University of Tennessee at Martin, TN VPI - Virginia Tech, VA VSCC - Volunteer State Community College, TN WAL - Washington and Lee University, VA WVU - West Virginia University, WV TABLE 2 LIST OF SOUTHEASTERN UNITED STATES EARTHQUAKES FOR THE TIME PERIOD 1 JANUARY 1982 THROUGH 30 JUNE 1982 2 JANUARY 1982 FAYETTEVILLE, TN MLD=2.8 (TEIC), ML=3.4 (GIT), MLD=2.0 (DUP) *TEIC LAT= 35.184N LONG= 86.417W H= 02-00-26.3 DPTH= 11.3 KM NO= 22, RMS RES= 0.19 SEC, GAP= 95 DEG, ERH= 0.5 KM, ERZ= 1.2 KM, Q= C (Felt: Lincoln, Franklin, Moore and Marshall Counties, Tennessee) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) OCA P 02-00-37.20 63.3 182 0.05 S -43.30 -1.80X RCG IP -42.68 100.2 103 -0.21 IS -54.80 -0.23 GLT P -47.40 130.9 357 0.19 S -01-03.10 0.06 HVA P -00-48.00 132.4 194 0.17 S -01-03.20 -0.36 PWLA IP -00-49.93 151.9 261 -0.04 IS -01-07.70 -0.16 CRG P -00-55.00 177.9 109 0.20 S -01-15.80 -0.18 ETT IP -00-55.12 179.1 85 0.14 IS -01-16.40 -0.21 TSA P -01.00 222.2 196 -0.57 S -28.30 0.16 BKA P -01.00 223.5 220 -0.32 S -30.80 3.10X EBZ EP -08.82 267.3 269 1.55X ES -38.10 0.29 CGTN IP -10.63 289.7 57 0.19 ES -43.96 1.28X MLA P -16.50 299.3 203 4.90X S -49.00 4.31X AVNC EP -18.38 356.3 82 -0.20 IS -57.09 -0.31 LGAR EP -22.90 392.0 261 0.12 ES -04.41 0.38 NOTE: For additional details refer to: TEIC PRELIMINARY SEISMOLOGICAL BULLETIN, JANUARY-MARCH, 1982, VOL. III, NO. 1, June, 1982, 30 p. *GIT LAT= 35.118N LONG= 86.381W H= 02-00-26.5 DPTH= 0.0 KM, FXD NOTE: This GIT epicenter calculated from arrival-time data at the following stations: OCA, HVA, CRG, BKA, MLA, TSA, EP1 and BEV. *USGS LAT= 35.190N LONG= 86.440W H= 02-00-25.8 DPTH= 7.0 KM, FXD NO OF STA= 18, STD DEV RES= 0.0 SEC NOTE: This USGS epicenter calculated from arrival-time data at the following stations: OCA, RCG, GLT, HVA, PWLA, ETT, ORT, TSAL, EBZ, CGTN, OKG, ELC, AVNC, LGAR, PRM, POW:2, IN3 and JSC. Additional Data STA PHASE TIME STA PHASE TIME EP1 PLG 02-01-27.8 BEV PLG 02-01-24.9 SLG -12.0 SLG -02-05.0 ORT EP -00-56.8 POW:2 EP -01-28.5 S -01-22.5 IN3 EP -29.7 OKG EP -12.0 JSC EP -33.2 ELC EP -16.0 CVV ESN -03-21 PRM EP -21.8 SRPW EP? -02-42 SRPD EP? -40.5 13 JANUARY 1982 CENTRAL VIRGINIA MLD= 1.5 (VPI) *VPI LAT= 37.749N LONG= 78.070W H= 13-16-25.0 DPTH= 9.4 KM NO= 15, RMS RES= 0.15 SEC, GAP= 170 DEG, ERH= 0.8 KM, ERZ= 0.9 KM, Q= B HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.6, 23; 0.8, -67 AND THE VERTICAL IS 0.8 KM. QUALITY= A. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) GHV IPC 13-16-26.95 6.0 327 0.13 S -28.20 0.03 NA12 IPC -30.25 30.9 33 -0.04 S -34.20 0.03 CVL EP -32.00 43.0 307 -0.21 S -37.45 -0.05 NA2 EP -30.30 50.7 34 -3.14X S -39.50 -0.12 FRV EP -35.90 65.8 203 -0.01 S -43.95 0.06 CNV EP -40.50 79.4 50 2.39X S -48.10 0.40 PBV S -52.50 97.6 151 -0.32 FTV S -17-00.0 124.3 356 -0.17 BV3 EP -16-50.8 158.6 290 0.14 S -17-10.4 0.98X BV4 EP -16-52.0 168.3 294 0.14 S -17-11.5 0.01 15 JANUARY 1982 MIDDLETON PLACE, SOUTH CAROLINA MLD= 1.7 (USGS) *USGS LAT= 32.883N LONG= 80.084W H= 07-54-05.7 DPTH= 0.5 KM, FXD NO= 5, RMS RES= 0.16 SEC, GAP= 209 DEG, ERH= 74 KM, ERZ= 99 KM, Q= D HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 1.8, -118; 73.6, -28 AND THE VERTICAL IS 99 KM. QUALITY= D. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CCS IPD 07-54-08.5 17.6 245 -0.10 S -09.5 -1.29X PBF IPD -10.9 30.4 94 0.17 S -14.5 -0.30 SBK IPD -11.8 36.2 194 0.11 S -16.1 -0.07 18 JANUARY 1982 CENTRAL VIRGINIA MLD= 0.3 (VPI) *VPI LAT= 37.905N LONG= 77.839W H= 06-11-41.2 DPTH= 7.4 KM NO= 11, RMS RES= 0.11 SEC, GAP= 171 DEG, ERH= 1.1 KM, ERZ= 2.2 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.6, -126; 1.1, -36 AND THE VERTICAL IS 2.2 KM. QUALITY= A. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) NA12 IPC 06-11-43.20 9.3 338 0.00 S -44.70 0.06 NA5 EP -43.60 12.7 40 -0.04 S -45.48 0.07 NA2 EP -45.53 25.9 18 -0.13 S -48.85 -0.04 GHV EP -45.60 26.6 242 -0.17 S -49.00 -0.10 CVL EP -50.60 55.3 279 0.20 S -57.10 -0.01 FRV EP -56.30 90.5 211 0.15 S -12-15.70 -1.35X 28 JANUARY 1982 BARNWELL, SOUTH CAROLINA ML= 2.1 (GIT), MLD= 3.4 (USGS) *GIT LAT= 33.033N LONG= 81.460W H= 04-52-52.5 DPTH= 12.1 KM STA PHASE TIME STA PHASE TIME BEV PLG 04-53-19.9 SRN PG 04-52-59.1 SLG -40.9 S -53-03.2 EP1 PLG -16.0 SRW PG -52-57.2 SLG -33.1 S -53-01.5 CH5 PLG -11.7 SRD PG -52-58.1 SLG -25.1 S -53-01.1 CH6 PLG -15.9 SLG -33.0 *USGS LAT= 32.982N LONG= 81.393W H= 04-52-51.9 DPTH= 7.0 KM NO= 17, RMS RES= 0.20 SEC, GAP= 208 DEG, ERH= 2.9 KM, ERZ= 1.6 KM, Q= D HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.9, -70; 3.0, 20 AND THE VERTICAL IS 1.6 KM. QUALITY= B. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) SRPW EP 04-52-57.2 29.9 325 0.10 ES -53-01.5 0.62X SRPD EP -52-58.1 35.5 303 0.09 ES -53-01.1 -1.34X SRPN EP -52-59.1 42.6 335 -0.07 ES -53-03.2 -1.25X OSB EP -05.7 80.8 39 0.25 MTT EP -06.8 88.3 345 0.12 AIN EP -11.3 115.8 83 0.07 ES -25.0 -0.32 MGS EP -11.2 117.5 95 -0.32 CH5 EP -11.7 120.3 314 -0.27 ES -25.1 -1.51X JSC EP -15.8 144.4 5 -0.11 CH6 EP -15.9 144.5 314 -0.03 ES -33.0 -0.45 EP1 EP -16.6 149.7 316 0.04 ES -33.1 -1.44X PRM IPC -16.75 151.8 324 -0.07 ES -35.0 0.01 PBF IP -17.3 153.3 95 0.31 ES -37.0 1.71X BEV EP -19.9 174.9 315 0.26 ES -40.9 1.03X Additional Data STA PHASE TIME CVV ES 04-55-05 SRPN IP -52-59 S -53-03.9 SRPW IP? -52-57.1 SRPD IP -58.2 30 JANUARY 1982 ALCOA, TENNESSEE MLD= 2.6 (TEIC), ML= 2.2 (GIT) *TEIC LAT= 35.788N LONG= 83.990W H= 12-39-13.3 DPTH= 14.3 KM NO= 23, RMS RES= 0.19 SEC, GAP= 98 DEG, ERH= 0.5 KM, ERZ= 0.5 KM, Q= B STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) HPK P 12-39-17.30 18.3 33 0.03 S -20.10 -0.05 TKL IP -18.14 24.3 126 0.03 IS -21.70 0.09 ORT P -19.30 31.5 295 0.10 S -19.30 0.20 ETT IP -24.36 66.4 219 -0.23 IS -33.09 0.28 BHT IP -27.55 86.6 274 -0.13 ES -38.45 0.28 BBG IP -29.91 102.7 171 -0.24 ES -42.00 -0.43 RCG IP -37.74 152.8 234 -0.09 IS -55.80 0.08 BENN EP -46.45 212.2 97 -0.47 ES -40-11.20 -0.25 BEV P -39-47.20 217.4 149 -1.03 S -40-14.10 0.40 LDV P -39-47.30 220.7 149 -0.41 S -40-14.90 2.08X GLT P -39-49.60 234.7 286 -0.73 S -40-17.30 -0.13 EP1 P -39-51.00 244.4 147 -0.62 S -40-20.80 1.22X L6KY S -20.60 248.5 343 -0.15 JUDY S -22.90 260.7 1 -0.13 SBKY P -39-53.10 270.5 1 -1.77 S -40-25.35 0.25 NOTE: For additional details refer to: TEIC PRELIMINARY SEISMOLOGICAL BULLETIN, JANUARY-MARCH, 1982, VOL. III, NO. 1, June, 1982, 30 p. *GIT LAT= 35.825N LONG= 84.096W H= 12-39-09.6 DPTH= 0.0 KM, FXD ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 8.8 KM SEMI-MINOR AXIS= 3.2 KM AZ OF MAJOR AXIS= 76 DEG AREA OF ELLIPSE= 88 SQ KM NOTE: This GIT epicenter was calculated from arrival-time data at the following stations: BEV, LDV, OCA, CH6, CH5 and EP1. Additional Data STA PHASE TIME STA PHASE TIME OCA SLG 12-40-21.2 CH5 PLG 12-39-59.0 CH6 PLG -39-51.2 SLG -40-31.3 SLG -40-22.9 EP1 PLG -39-51.0 SLG -40-20.8 31 JANUARY 1982 GATLINBURG, TENNESSEE MLD= 2.1 (TEIC) *TEIC LAT= 35.736N LONG= 83.646W H= 10-13-42.5 DPTH= 11.2 KM NO= 22, RMS RES= 0.28 SEC, GAP= 100 DEG, ERH= 0.8 KM, ERZ= 0.9 KM, Q= B STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) TKL IP 10-13-45.89 14.5 233 0.30 IS -47.58 -0.30 HWR P -47.60 26.6 275 0.22 S -51.30 0.31 HPK P -47.50 29.9 315 -0.39 S -51.50 -0.37 ORT S -14-00.40 62.7 288 -0.10 ETT EP -13-57.25 86.4 238 -0.28 ES -14-06.79 -0.38 CGTN EP -13-57.30 94.7 356 -0.24 BBG IP -58.08 96.8 189 -0.49 IS -14-09.75 -0.19 BHT ES -20.55 118.1 276 4.57X RCG EP -10.98 176.2 241 0.25 IS -31.40 0.03 BENN IP -11.41 180.6 96 0.01 IS -32.75 0.22 LDV P -14.00 196.7 153 0.13 S -38.70 1.90X BEV P -14.50 200.9 155 0.03 S -40.20 2.30X EP1 P -17.50 223.5 152 -0.46 S -44.30 0.41 CH6 P -18.80 230.4 153 0.22 S -41.00 -4.72X CH5 S -53.40 253.6 151 2.15X GLT S -55.40 266.4 285 0.24 SBKY S -58.70 278.0 355 0.26 PUV S -15-02.30 291.3 61 3.08X NOTE: For additional details refer to: TEIC PRELIMINARY SEISMOLOGICAL BULLETIN, JANUARY-MARCH, 1982, VOL. III, NO. 1, June, 1982, 30 p. 1 FEBRUARY 1982 MIDDLETON PLACE, SOUTH CAROLINA MLD= 2.0 (USGS) *USGS LAT= 32.925N LONG= 80.169W H= 07-25-15.9 DPTH= 0.5 KM, FXD NO= 5, RMS RES= 0.19 SEC, GAP= 148 DEG, ERH= 87 KM, ERZ= 99 KM, Q= D HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 1.7, 3; 87.4, -87 AND THE VERTICAL IS 99 KM. QUALITY= D. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CCS IPD 07-25-18.5 14.5 214 0.19 ES -19.8 -0.32 AIN IPC -19.4 20.2 2 0.15 ES -21.5 -0.26 PBF IPC -22.3 38.8 100 -0.05 ES -25.0 -2.16X 5 FEBRUARY 1982 NORTHWEST OF MONTGOMERY, ALABAMA ML= 2.5 (GIT) *GIT LAT= 32.678N LONG= 86.623W H= 10-59-06.9 DPTH= 0.0 KM, FXD STA PHASE TIME STA PHASE TIME HGA PN 10-59-39.4 HVA PLG 10-59-31.9 PLG -40.3 SN -48.7 SLG -59.6 SLG -52.9 MLA PLG -25.9 BKA PLG -33.9 SLG -31.3 SLG -55.9 OCA PLG -40.9 TSA PLG -19.3 SLG 11-00-07.8 SLG -29.3 TDA PLG 10-59-27.2 SLG -38.5 5 FEBRUARY 1982 NORTHWEST OF MONTGOMERY, ALABAMA ML= 2.4 (GIT) *GIT LAT= 32.816N LONG= 86.596W H= 14-17-26.3 DPTH= 0.0 KM, FXD STA PHASE TIME STA PHASE TIME HGA PLG 14-17-56.8 BKA PN 14-17-50.9 SLG -18-17.8 PLG -52.0 OCA PLG -17-58.0 SN -18-09.1 SLG -18-22.5 SLG -12.6 TDA PLG -17-43.8 TSA PLG -17-36.9 SLG -55.0 SLG -48.3 HVA PLG -48.2 SLG -18-04.0 20 FEBRUARY 1982 CENTRAL VIRGINIA MLD= 1.5 (VPI) *VPI LAT= 37.486N LONG= 77.707W H= 04-34-25.8 DPTH= 0.8 KM, FXD NO= 15, RMS RES= 0.13 SEC, GAP= 145 DEG, ERH= 0.8 KM, ERZ= 79.8 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.4, 2; 0.8, -88 AND THE VERTICAL IS 79.8 KM. QUALITY= D. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) GHV IPC 04-34-33.93 49.2 314 0.06 S -39.78 0.00 NA11 EP -34.73 55.2 2 -0.12 S -41.36 -0.11 NA5 EP -35.15 56.4 356 0.11 S -42.05 0.24 NA12 EP -35.15 57.2 345 -0.04 S -41.85 -0.24 PBV EP -35.31 58.0 164 -0.01 S -42.28 -0.00 FRV EP -37.20 65.8 241 0.58X S -44.46 -0.07 NA2 EP -37.34 71.2 357 -0.14 S -45.45 -0.58X CNV EP -39.79 85.0 20 0.04 S -49.99 0.04 CVL IPC -40.20 86.3 310 0.23 S -51.92 1.60X 23 FEBRUARY 1982 ALABAMA-GEORGIA BORDER ML= 2.5 (GIT) *GIT LAT= 34.614N LONG= 85.458W H= 09-19-07.9 DPTH= 0.0 KM, FXD STA PHASE TIME STA PHASE TIME TDA PLG 09-19-29.8 HVA PLG 09-19-31.0 SLG -45.0 SLG -48.0 OCA PLG -22.9 TSA PLG -43.1 SLG -33.9 SLG -20-08.0 HGA PLG -17.4 BKA PLG -19-51.2 SLG -24.3 SLG -20-20.6 23 FEBRUARY 1982 SUMMERVILLE, GEORGIA MLD= 2.1 (TEIC) *TEIC LAT= 34.555N LONG= 85.434W H= 09-19-08.7 DPTH= 10.0 KM NO= 10, RMS RES= 0.19 SEC, GAP= 204 DEG, ERH= 1.3 KM, ERZ= 2.5 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) ETT IP 09-19-28.78 123.8 46 -0.25 ES -43.65 -0.27 BHT IP -33.34 150.1 17 0.27 IS -50.87 -0.03 BBG IP -33.69 152.8 77 0.21 IS -51.40 -0.17 TKL IP -39.78 194.6 51 -0.10 IS -20-02.93 0.29 PWLA IP -19-47.55 245.3 281 -0.05 IS -20-16.06 0.07 NOTE: For additional details refer to: TEIC PRELIMINARY SEISMOLOGICAL BULLETIN, JANUARY-MARCH, 1982, VOL. III, NO. 1, June, 1982, 30 p. 24 FEBRUARY 1982 LENOIR CITY, TENNESSEE MLD= 1.3 (TEIC) *TEIC LAT= 35.731N LONG= 84.299W H= 12-10-06.7 DPTH= 13.2 KM NO= 7, RMS RES= 0.13 SEC, GAP= 262 DEG, ERH= 0.8 KM, ERZ= 1.2 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) ETT EP 12-10-15.20 47.1 197 0.24 IS -20.90 -0.12 TKL EP -15.20 48.2 100 0.05 IS -21.36 -0.03 BHT ES -24.50 59.8 282 -0.03 BBG IP -23.73 104.9 155 -0.18 IS -36.65 0.16 NOTE: For additional details refer to: TEIC PRELIMINARY SEISMOLOGICAL BULLETIN, JANUARY-MARCH, 1982, VOL. III, NO. 1, June, 1982, 30 p. 1 MARCH 1982 MIDDLETON PLACE, SOUTH CAROLINA MLD= 2.8 (USGS), ML= 2.8 (GIT) Local Network Solution *USGS LAT= 32.936N LONG= 80.138W H= 03-33-13.6 DPTH= 6.7 KM NO= 8, RMS RES= 0.28 SEC, GAP= 116 DEG, ERH= 3.1 KM, ERZ= 4.2 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 2.4, -12; 3.1, -102 AND THE VERTICAL IS 4.2 KM. QUALITY= B. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CCS IPD 03-33-16.6 17.3 219 -0.02 AIN IPD -17.2 19.1 353 0.30 ES -19.0 -0.39 PBF IPD -19.6 36.2 103 -0.05 SRPW EP -35.4 137.6 282 -0.49 ES -52.6 0.07 SRPN IPC -36.9 142.2 288 0.45 ES -53.1 -0.41 Regional Network Solution *USGS LAT= 32.972N LONG= 80.182W H= 03-33-12.5 DPTH= 5.0 KM, FXD NO OF STA= 11, STD DEV RES= 0.0 SEC STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CCS P 03-33-16.6 22 202 0.6 PBF P -19.6 44 107 -0.4 JSC P -41.5 178 326 0.3 CH5 P -47.0 211 294 0.5 PRM P -48.7 234 302 -0.5 BBG IP -34-09.6 400 303 -0.1 IS -51.4 TKL IP -15.6 445 313 -0.2 IS -35-03.6 BLA EP -34-19.0 467 357 -0.1 ETT IP -19.1 478 305 -0.3 IS -35-08.8 ORT EP -34-23.0 500 312 0.2 PWLA IP -35-04.5 756 289 8.5X Additional Data STA PHASE TIME CVV IPN 03-34-30.1 SN -35-26.0 SRPN EP? -33-36.5 S -52.5 SRPW EP? -36 S -52 *GIT LAT= 32.840N LONG= 80.134W H= 03-33-11.8 DPTH= 5.0 KM ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 108.0 KM SEMI-MINOR AXIS= 9.0 KM AZ OF MAJOR AXIS= 60 DEG AREA OF ELLIPSE= 3053 SQ KM STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) BEV PN 03-33-52.8 280.0 300 -0.10 PLG -57.5 -1.00 SN -34-22.2 -1.06 SLG -34.8 3.15 EP1 PN -33-50.0 254.5 299 0.21 SN -34-18.0 0.12 SLG -22.2 -2.31 CH5 PN -33-47.0 226.6 296 0.62 PLG -50.5 0.83 SN -34-11.5 -0.48 2 MARCH 1982 JENKINSVILLE, SOUTH CAROLINA ML= 2.1 (GIT) *GIT LAT= 34.469N LONG= 81.398W H= 16-48-06.8 DPTH= 0.0 KM, FXD ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 18.0 KM SEMI-MINOR AXIS= 13.9 KM AZ OF MAJOR AXIS= 122 DEG AREA OF ELLIPSE= 789 SQ KM STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CH5 PN 16-48-28.0 117.1 226 -0.58 SN -43.0 -1.84 PLG -29.1 2.56 SLG -41.1 0.13 BEV PN -29.9 129.7 251 -0.22 SN -44.3 -3.21 PLG -30.2 1.58 SLG -46.0 1.58 11 APRIL 1982 CENTRAL VIRGINIA MLD= 0.9 (VPI) *VPI LAT= 37.730N LONG= 78.419W H= 20-01-14.6 DPTH= 1.3 KM, FXD NO= 8, RMS RES= 0.10 SEC, GAP= 277 DEG, ERH= 1.9 KM, ERZ= 28.1 KM, Q= D HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.8, -66; 1.9, 24 AND THE VERTICAL IS 28.1 KM. QUALITY= D. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CVV EP 20-01-19.25 28.2 352 0.00 S -22.60 -0.04 GHV IPD -19.10 28.3 75 -0.17 S -22.70 0.02 NA12 EP -23.70 55.1 59 0.03 S -30.20 -0.09 NA2 IPD -26.90 73.7 53 0.19 S -35.6 0.04 13 APRIL 1982 PARR, SOUTH CAROLINA NO MAG GIVEN *USGS LAT= 34.290N LONG= 81.381W H= 09-25-19.0 DPTH= 5.0 KM, FXD NO OF STA= 5, STD DEV RES= 0.4 SEC STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) JSC EP 09-25-21.5 11 96 0.2 PRM EP -36.1 89 256 0.3 VEW EP -53.2 222 142 -0.3 ORT:2 EP -26-06.3 322 305 -0.3 BLA EP -08.5 334 15 0.1 Additional Data STA PHASE TIME CVV IPN 09-26-26.9 SN -27-14.8 FTV SN -28 SRPN EP? -25-39.3 S -53.1 SRPW EP -41 S -55 SRPD EP -42.3 S -59.2 13 APRIL 1982 BRISTOL, TENNESSEE MLD= 2.7 (TEIC) *TEIC LAT= 36.522N LONG= 82.041W H= 13-04-12.9 DPTH= 5.0 KM, FXD NO= 16, RMS RES= 0.24 SEC, GAP= 164 DEG, ERH= 0.9 KM, ERZ= 2.2 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) BENN IP 13-04-32.30 111.6 162 0.23 IS -45.90 -0.15 PUV P -33.60 122.7 63 -0.20 S -49.00 0.05 NAV P -36.40 141.9 52 -0.35 S -54.00 -0.16 HWV P -39.80 159.5 42 0.37 S -59.00 0.20 BLA P -40.40 163.4 62 0.37 S -60.40 0.57 TKL IP -43.10 183.2 238 0.03 ES -05-05.30 0.21 BBG IP -04-51.90 243.1 221 -0.35 IS -05-21.20 0.23 BV2 P -04-55.00 259.8 46 0.28 BV1 P -57.30 279.6 49 0.16 Additional Data STA PHASE TIME CVV IPN 13-05-08.1 SN -50.5 FTV PN -22 17 APRIL 1982 TRENTON, TENNESSEE ML= 2.75 (GIT) *GIT LAT= 35.969N LONG= 88.914W H= 01-22-56.9 DPTH= 0.0 KM, FXD ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 12.8 KM SEMI-MINOR AXIS= 7.2 KM AZ OF MAJOR AXIS= 54 DEG AREA OF ELLIPSE= 291 SQ KM STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CRG PN 01-23-56.3 416.5 110 1.05 PLG -24-04.0 -2.15 SLG -56.5 1.40 OCA PN -23-37.9 268.8 123 0.68 PLG -41.2 -0.53 SLG -24-12.5 -1.10 HVA PN -23-39.8 288.7 137 0.16 SLG -24-19.7 0.49 4 MAY 1982 CENTRAL VIRGINIA MLD= 1.4 (VPI) *VPI LAT= 37.564N LONG= 78.463W H= 14-54-02.2 DPTH= 5.2 KM, FXD NO= 11, RMS RES= 0.27 SEC, GAP= 139 DEG, ERH= 2.8 KM, ERZ= 8.3 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 1.1, 10; 2.8, -80 AND THE VERTICAL IS 8.3 KM. QUALITY= C. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) GHV IPD 14-54-09.0 40.4 51 0.11 S -13.5 -0.29 FRV IPD -09.1 41.4 167 0.09 S -13.8 -0.19 CVL EP -09.7 46.3 0 -0.16 S -15.0 -0.46 NA2 EP -17.1 88.8 45 0.31 S -27.8 0.34 BV3 EP -26.5 137.0 303 1.73X S -42.0 0.74X BV2 EP -21.1 143.0 296 -4.59X S -42.6 -0.25 BV4 EP -27.0 148.8 306 0.41 S -44.8 0.39 4 MAY 1982 CENTRAL VIRGINIA MLD= 0.7 (VPI) *VPI LAT= 37.552N LONG= 78.442W H= 14-57-31.2 DPTH= 0.7 KM, FXD NO= 6, RMS RES= 0.08 SEC, GAP= 238 DEG, ERH= 1.3 KM, ERZ= 82.4 KM, Q= D HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.5, 9; 1.3, -81 AND THE VERTICAL IS 82.4 KM. QUALITY= D. STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) FRV EP 14-57-37.8 39.4 169 0.13 S -42.3 -0.12 GHV EP -37.8 39.9 48 0.06 S -42.5 -0.03 CVL S -44.7 47.7 358 -0.05 NA2 S -56.3 88.4 44 -0.00 5 MAY 1982 SWEETWATER, TENNESSEE ML= 1.9 (GIT) *GIT LAT= 35.666N LONG= 84.480W H= 15-28-16.1 DPTH= 0.0 KM, FXD STA PHASE TIME STA PHASE TIME TLT PLG 15-28-24.0 CRG PLG 15-28-35.2 SLG -29.8 SLG -48.0 OCA PLG -49.0 RMG PLG -43.8 SLG -29-18.5 SLG -29-04.5 TDA SLG -33.9 6 MAY 1982 CENTRAL VIRGINIA MLD= 2.0 (VPI) *VPI LAT= 37.854N LONG= 77.578W H= 07-18-10.9 DPTH= 9.7 KM NO= 18, RMS RES= 0.20 SEC, GAP= 153 DEG, ERH= 1.0 KM, ERZ= 2.3 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.7, 8; 1.0, -82 AND THE VERTICAL IS 2.3 KM. QUALITY= A. (One felt report from resident in Montpelier, Virginia, some 15 km southeast of the North Anna site) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) NA11 IPD 07-18-14.31 17.1 327 0.14 NA5 IPD -15.10 21.4 316 0.30 NA12 IPD -16.29 30.1 298 0.15 S -19.88 -0.06 NA2 IPD -16.65 33.7 334 -0.05 S -20.48 -0.43 CNV EP -18.35 42.9 25 0.19 S -23.23 -0.22 GHV IPD -18.90 47.0 262 0.07 S -24.34 -0.25 CVL IPC -24.13 78.9 280 0.13 S -33.80 0.26 PBV EP -26.75 96.8 178 -0.16 S -38.64 0.06 FRV EP -27.55 99.9 224 0.11 S -39.01 -0.49 FTV EP -31.30 123.5 335 0.16 S -45.70 -0.19 BV3 EP -43.20 196.9 283 1.94X S -19-05.70 2.30X BV4 EP -18-43.90 205.0 286 1.63X S -19-08.00 2.86X BV2 EP -18-44.70 208.0 279 2.11X S -19-08.50 2.79X 12 MAY 1982 RHINEGOLD, GEORGIA MLD= 2.5 (TEIC), ML= 2.6 (GIT) *TEIC LAT= 34.895N LONG= 85.014W H= 01-21-52.2 DPTH= 9.7 KM NO= 26, RMS RES= 0.19 SEC, GAP= 90 DEG, ERH= 0.4 KM, ERZ= 0.7 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) RCG IP 01-21-58.12 31.8 286 0.17 IS -22-01.80 -0.34 TVG P -03.10 63.6 205 0.08 S -10.70 -0.25 SMG P -03.90 67.7 207 0.15 S -12.20 -0.01 ETT IP -04.09 69.9 47 -0.01 IS -12.68 -0.14 TLT P -06.00 80.4 56 0.16 S -15.70 -0.13 HGA P -09.20 103.9 227 -0.25 S -21.30 -0.18 BHT IP -10.00 105.8 3 0.26 IS -30.32 -0.09 BBG IP -10.60 110.0 91 0.22 IS -23.45 -0.24 OCA P -13.60 133.7 257 -0.12 S -29.90 -0.08 HPK P -17.30 154.0 42 0.18 S -35.50 0.16 TDA P -21.00 176.7 212 0.40 S -41.80 0.44 BEV P -29.00 227.8 113 0.18 S -56.00 0.10 EP1 P -32.90 252.6 114 0.13 S -59.80 -0.04 *GIT LAT= 34.898N LONG= 85.023W H= 01-21-51.9 DPTH= 7.8 KM NOTE: This GIT epicenter calculated from arrival-time data at the following stations: TLT, OCA, TDA, HGA, RMG, TVG, SMG, EP1, BEV RCG, ETT, BBG, BHT and HPK. Additional Data STA PHASE TIME RMG PLG 01-22-03.9 SLG -13.2 12 MAY 1982 HALEYVILLE, ALABAMA MLD= 1.7 (TEIC) *TEIC LAT= 34.226N LONG= 87.491W H= 04-58-4.6 DPTH= 12.1 KM NO= 12, RMS RES= 0.20 SEC, GAP= 239 DEG, ERH= 2.1 KM, ERZ= 4.1 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) PWLA IP 04-58-19.88 98.8 328 -0.12 IS -31.39 0.12 OCA IP -22.00 106.2 66 0.05 IS -33.40 -0.02 HGA IP -29.00 151.6 89 -0.01 IS -47.50 0.33 EBZ EP -34.40 198.4 301 -1.35X IS -57.41 -0.57 TVG IP -37.60 202.2 85 0.45 IS -59-00.30 -0.26 RCG ES -03.25 213.4 67 0.02 BHT EP -58-50.20 293.9 52 1.08 ES -59-20.00 -4.49X ETT ES -26.50 303.4 66 2.78X BBG EP -58-55.00 345.1 78 -0.41 ES -59-36.75 4.21X *GIT LAT= 34.320N LONG= 87.438W H= 04-58-04.3 DPTH= 0.0 KM, FXD NOTE: This GIT epicenter calculated from arrival-time data at the following stations: TVG, HGA, OCA and PWLA. 15 MAY 1982 SWEETWATER, TENNESSEE MLD= 0.9 (TEIC), ML= 1.2 (GIT) *TEIC LAT= 35.678N LONG= 84.353W H= 03-54-47.4 DPTH= 24.6 KM NO= 9, RMS RES= 0.14 SEC, GAP= 222 DEG, ERH= 1.2 KM, ERZ= 1.9 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) ETT IP 03-54-55.00 40.2 193 -0.04 IS -55-00.62 0.01 TLT IP -54-55.60 42.3 171 0.26 IS -55-01.10 -0.04 BHT EP -54-57.15 56.7 289 -0.25 IS -55-04.75 -0.04 BBG IP -04.32 101.9 151 0.15 ES -16.13 -0.29 CRG IS -19.80 115.0 190 -0.07 RMG ES -36.00 172.9 211 0.85X HGA ES -39.00 208.2 221 -5.32X *GIT LAT= 35.250N LONG= 84.908W H= 03-54-45.8 DPTH= 0.0 KM, FXD NOTE: This GIT epicenter calculated from arrival-time data at the following stations: TLT, BHT, BBG and ETT. 17 MAY 1982 SWEETWATER, TENNESSEE ML= 1.0 (GIT) *GIT LAT= 35.723N LONG= 84.321W H= 03-54-13.4 DPTH= 15.3 KM STA PHASE TIME STA PHASE TIME CBT PG 03-54-18.3 RHT PLG 03-54-28.7 S -22.0 SLG -39.0 TLT PLG -21.5 SLG -27.8 18 MAY 1982 CHRISTIANSBURG, VIRGINIA MLD= 1.6 (VPI) *VPI LAT= 37.129N LONG= 80.500W H= 03-16-33.9 DPTH= 10.5 KM NO= 18, RMS RES= 0.23 SEC, GAP= 148 DEG, ERH= 1.3 KM, ERZ= 1.3 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.8, -88; 1.3, 2 AND THE VERTICAL IS 1.4 KM. QUALITY= A. (Approximately 25 km southeast of Giles County zone) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) MSH IPC 03-16-36.4 8.9 100 -0.02 S -38.1 0.10 BLA IPD -36.6 11.6 38 -0.12 S -38.4 -0.10 BAV IPC -36.8 12.3 33 -0.01 S -38.7 0.06 PUV IPD -40.0 30.4 247 0.48 S -42.9 -0.20 NAV IPC -39.5 33.3 308 -0.48 S -43.9 0.05 HWV IPD -44.5 59.5 329 0.26 S -51.0 0.16 BV2 EP -53.6 123.0 25 -0.60 S -17-08.5 1.34X BV3 EP -16-56.5 139.1 28 -0.17 S -17-12.5 1.28X BV4 EP -16-58.8 148.7 23 0.65 S -17-14.9 1.26X FRV EP -16-56.5 190.2 88 -7.93X S -17-24.4 0.46 CVL EP -06.2 203.4 62 -0.19 S -29.0 1.75X GHV EP -09.5 224.1 71 -0.10 S -34.6 2.18X NA2 EP -16.6 267.1 65 1.14X S -47.2 5.17X 20 MAY 1982 CHATTANOOGA, TENNESSEE MLD= 1.0 (TEIC) *TEIC LAT= 35.037N LONG= 85.152W H= 07-12-7.7 DPTH= 12.0 KM NO= 15, RMS RES= 0.21 SEC, GAP= 161 DEG, ERH= 1.0 KM, ERZ= 0.9 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) RCG IP 07-12-11.80 19.1 249 0.22 IS -14.20 -0.20 RHT P -13.00 25.1 79 0.54 S -15.70 -0.22 DCT P -19.20 67.0 88 0.00 S -27.40 -0.19 CRG P -19.50 67.3 129 0.25 S -27.50 -0.17 ETT EP -19.65 71.1 63 -0.19 ES -28.56 -0.14 CBT P -22.20 86.8 50 -0.04 S -33.90 0.26 HGA P -25.40 107.1 216 -0.05 S -39.50 0.47 BBG EP -28.40 123.8 98 0.50X IS -42.60 -0.04 *GIT LAT= 35.026N LONG= 85.143W H= 07-12-08.2 DPTH= 0.0 KM, FXD NOTE: This GIT epicenter calculated from arrival-time data at the following stations: CBT, HGA, CRG, RHT, DCT, RCG and ETT. 24 MAY 1982 MCCAYSVILLE, GEORGIA MLD= 1.2 (TEIC) *TEIC LAT= 34.987N LONG= 84.451W H= 01-31-18.6 DPTH= 8.6 KM NO= 7, RMS RES= 0.06 SEC, GAP= 233 DEG, ERH= 0.6 KM, ERZ= 0.7 KM, Q= C STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) ETT EP 01-31-25.78 37.6 359 0.06 IS -30.00 -0.02 BBG IP -28.80 59.8 102 -0.05 IS -36.40 0.05 TKL ES -46.65 96.6 40 -0.03 BHT EP -36.10 105.4 335 -0.08 ES -49.20 0.17 26 MAY 1982 CHATTANOOGA, TENNESSEE MLD= 1.7 (TEIC), ML= 2.0 (GIT) *TEIC LAT= 34.989N LONG= 85.266W H= 07-42-43.1 DPTH= 17.3 KM NO= 23, RMS RES= 0.21 SEC, GAP= 107 DEG, ERH= 0.6 KM, ERZ= 0.8 KM, Q= B STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) RCG IP 07-42-46.46 7.7 259 0.18 IS -48.51 -0.09 RHT P -49.90 36.4 74 0.07 TVG P -54.50 67.9 182 -0.11 S -43-03.30 0.29 RMG P -42-55.10 72.5 183 -0.23 S -43-04.30 0.06 CRG P -42-55.40 72.8 120 0.04 S -43-04.30 -0.01 DCT P -42-56.10 77.6 84 0.01 S -43-06.00 0.41 ETT IP -42-56.67 82.8 63 -0.22 IS -43-06.79 -0.18 CBT P -42-59.00 98.2 51 -0.24 S -43-12.20 1.16X BHT EP -42-59.82 99.6 16 0.35 IS -43-11.70 0.27 OCA P -01.50 114.8 248 -0.29 S -15.20 -0.25 BBG IP -04.69 133.5 95 0.03 IS -20.21 -0.21 TKL IP -07.61 154.7 61 -0.30 IS -25.84 -0.20 TDA IP -11.20 175.0 203 0.20 ES -32.40 1.00X PWLA EP -23.03 255.5 269 0.52 ES -40.05 -1.28 *GIT LAT= 34.977N LONG= 85.246W H= 07-42-43.2 DPTH= 13.5 KM NOTE: This GIT hypocenter was calculated from arrival-time data at the following stations: RHT, CBT, CRG, RMG, TVG, OCA, TDA, DCT, RCG, ETT, BHT, BBG and RCG. 29 MAY 1982 GREENBACK, TENNESSEE MLD= 1.3 (TEIC) *TEIC LAT= 35.702N LONG= 84.142W H= 07-11-59.1 DPTH= 11.7 KM NO= 15, RMS RES= 0.16 SEC, GAP= 113 DEG, ERH= 0.5 KM, ERZ= 0.8 KM, Q= B STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) HWR ES 07-12-06.10 19.5 71 0.24 ORT IP -04.10 27.4 327 -0.14 IS -08.00 0.07 TKL IP -05.32 33.6 98 0.11 IS -09.54 -0.11 HPK IP -05.10 34.4 44 -0.23 IS -09.60 -0.24 ETT IP -08.00 50.5 214 0.06 IS -14.35 -0.01 BHT ES -21.30 74.4 282 0.29 BBG IP -15.14 96.7 162 -0.06 IS -26.20 -0.73 RBNC ES -30.90 111.6 110 0.01 BRBC ES -46.00 168.0 89 0.18 GFM ES -58.90 215.7 78 0.47 30 MAY 1982 SWEETWATER, TENNESSEE ML= 1.7 (GIT) *GIT LAT= 35.682N LONG= 84.207W H= 07-12-00.8 DPTH= 0.0 KM, FXD STA PHASE TIME STA PHASE TIME CBT PLG 07-12-05.2 DCT PLG 07-12-13.0 SLG -10.1 SLG -22.5 RHT PLG -15.2 TVG PLG -33.9 SLG -26.3 SLG -50.8 7 JUNE 1982 BEAVERDALE, GEORGIA NO ML GIVEN *GIT LAT= 34.897N LONG= 84.843W H= 03-28-48.8 DPTH= 12.3 + 1.1 KM ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 1.0 KM SEMI-MINOR AXIS= 0.4 KM AZ OF MAJOR AXIS= 162 DEG AREA OF ELLIPSE= 1.1 SQ KM STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) RHT PG 03-28-53.2 24.0 350 0.06 S -56.3 -0.03 CRG PLG -55.0 35.6 138 -0.06 SLG -29-00.0 0.04 DCT SLG -01.9 42.4 66 0.00 16 JUNE 1982 CENTRAL VIRGINIA MLD= 2.1 (VPI) *VPI LAT= 38.127N LONG= 78.841W H= 18-40-58.6 DPTH= 10.9 KM NO= 11, RMS RES= 0.13 SEC, GAP= 125 DEG, ERH= 0.7 KM, ERZ= 1.7 KM, Q= B HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.6, -81; 0.7, 9 AND THE VERTICAL IS 1.7 KM. QUALITY= A. (One felt report from Fishersville, Virginia, located approximately 45 km WNW of Charlottesville, Virginia) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CVV EP 18-41-04.9 37.0 116 -0.10 S -07.7 -1.94X GHV EP -11.0 74.3 120 0.03 S -20.0 0.02 BV2 EP -14.5 94.6 271 -0.10 S -26.0 0.18 NA2 EP -14.8 95.9 90 0.30 S -26.1 0.02 FTV EP -15.2 100.9 36 -0.10 S -27.4 -0.07 FRV EP -16.7 111.0 158 -0.14 S -30.0 -0.03 17 JUNE 1982 SERVILLA, TENNESSEE ML= 1.5 (GIT) *GIT LAT= 35.204N LONG= 84.413W H= 21-09-37.1 DPTH= 0.0 KM, FXD ERROR ELLIPSE (DERIVED FROM HYPO71): SEMI-MAJOR AXIS= 5.3 KM SEMI-MINOR AXIS= 1.4 KM AZ OF MAJOR AXIS= 171 DEG AREA OF ELLIPSE= 23 SQ KM STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) CGR PLG 21-09-48.7 62.4 194 0.91 SLG -56.2 0.40 TVG PLG -58.0 122.4 222 0.29 SLG -10-12.2 -0.46 DCT SLG -09-42.0 16.6 182 -0.94 CBT PLG -43.8 37.3 359 0.16 SLG -48.4 -0.35 23 JUNE 1982 BECKLEY, WEST VIRGINIA MLD= 2.5 (VPI) *VPI LAT= 37.870N LONG= 80.957W H= 16-17-34.1 DPTH= 11.1 KM NO= 25, RMS RES= 0.22 SEC, GAP= 113 DEG, ERH= 1.3 KM, ERZ= 2.0 KM, Q= C HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.9, 27; 1.3, -63 AND THE VERTICAL IS 2.0 KM. QUALITY= A. (No felt reports; quarry operators in the area reported that they did not blast anytime near the origin time of 12:17 EDST. We classify this event as a PROBABLE earthquake. This event was some 75 km northwest of the Giles County zone) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) HWV IPC 16-17-39.96 32.7 162 -0.06 S -44.12 -0.13 PWV IPD -44.51 60.0 188 0.02 S -51.94 0.04 NAV EP -44.87 63.2 167 -0.13 S -53.00 0.23 BMV EP -47.70 80.0 147 -0.03 S -57.60 0.16 BAV EP -48.60 85.9 147 -0.01 BLA IPD -48.77 87.2 147 -0.02 ES -59.73 0.48 PUV EP -49.92 94.8 172 -0.04 S -18-00.75 -0.50 BV2 EP -17-49.4 95.8 72 -0.71 S -18-01.0 -0.51 BV3 EP -17-52.8 112.1 69 0.17 S -18-16.7 0.89X BV1 EP -17-53.5 118.8 73 -0.16 S -18-07.5 -0.07 MRG S -33.0 214.2 24 0.56 CVV IPD -09.2 219.9 87 0.14 FRV IPD -12.6 241.3 108 0.25 GHV EP -13.58 251.1 92 0.02 FTV EP -15.6 267.6 66 -0.01 TKL EP -25.6 351.4 226 -0.26 AN8 EP -31.0 390.4 312 0.38 25 JUNE 1982 CENTRAL VIRGINIA MLD= 1.8 (VPI) *VPI LAT= 37.831N LONG= 77.502W H= 23-03-47.0 DPTH= 13.4 KM NO= 18, RMS RES= 0.14 SEC, GAP= 166 DEG, ERH= 0.9 KM, ERZ= 1.5 KM, Q= B HYPOELLIPSE SEMI-AXES (LENGTH IN KM, AZIMUTH IN DEG): HORIZONTALS ARE 0.8, 96; 0.9, -6 AND THE VERTICAL IS 1.5 KM. QUALITY= A. (Note: This event has virtually the identical location as the previously listed earthquake at 07-18-10.9 UTC on 6 May 1982 that had one felt report) STA PHASE TIME DIST (KM) AZ (DEG) RES (SEC) NA11 IPD 23-03-51.59 23.3 316 0.18 S -54.58 -0.07 NA5 IPD -52.38 28.1 310 0.28 S -55.81 -0.03 NA12 IPD -53.61 37.2 297 0.11 S -58.27 0.02 NA2 IPD -53.84 39.3 327 0.04 S -58.48 -0.31 CNV EP -54.45 43.0 15 0.06 S -59.44 -0.36 GHV IPD -55.97 53.5 266 -0.07 S -04-02.53 -0.13 CVL EP -01.21 86.0 281 0.04 S -11.53 -0.01 PBV EP -02.52 94.2 182 0.09 S -13.51 -0.20 FRV IPD -03.87 103.0 227 0.07 S -16.07 -0.01 ACKNOWLEDGMENTS 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 National Science Foundation - Geophysics Program, The Nuclear Regulatory Commission - Office of Reactor Safety Research, The United States Geological Survey - Office of Earthquake Studies, The Georgia Power Company, The Virginia Electric and Power Company. ERRATA AND ADDENDA Station Errata The following corrections have been made in Table 1: South Carolina - PBF, SBK and VEW: Elevations changed to -68 Tennessee - ETT: Etawa changed to Etowah - PGM: Changed from Tennessee to Mississippi station - *: Changed from easternmost to westernmost Tennessee Earthquake Data and Locations Errata/Addenda The following event should have been part of Bulletin No. 7. The source for the listing is Earthquakes in the U.S., Oct.-Dec. 1980, USGS Circular 853-D, p. D30. 30 DECEMBER 1980 NORTHEASTERN KENTUCKY ML= 1.6 (TEIC) *TEIC LAT= 38.20N LONG= 83.91W H= 03-07-08.1 DPTH= 11 KM (Felt (III) at Moorefield and Sharpsburg. Also felt at Bethel, East Union, Little Rock, Mount Sterling, North Middletown and Sherburne (press reports) We are in the process of preparing an event tape from SEUSSN BULLETINS 1 through 10. In reviewing the earthquakes listed in those publications, some hypocentral and error parameters were changed. Those changes were derived from the following: 1. Relocation of some North Carolina and Tennessee earthquakes because of the significant amount of "Additional Data" not employed in the original locations 2. Conversion of error ellipsoid parameters to horizontal and vertical projection for some South Carolina shocks 3. Results of special relocation studies for most Virginia earthquakes 4. Correction of typographical errors The following presents all of the above corrections in what is to be our event tape format. The availability of the tape will be announced at a future date.