Phase Data
18 FEB 2011 ( 49) ot = 04:59:49.80 +/- 0.19 ARKANSAS lat = 35.251 +/- 2.8 lon = -92.409 +/- 1.6 MAGNITUDE 4.0 (GS) dep = 5.0 (geophysicist) 20 km (10 miles) N of Conway, Arkansas (pop 43,000) 55 km (35 miles) N of LITTLE ROCK, Arkansas (pop 183,000) 60 km (40 miles) W of Searcy, Arkansas (pop 18,000) 65 km (40 miles) E of Russellville, Arkansas (pop 23,000) Felt in the Greenbrier area. nph = 65 of 177 se = 0.80 FE=502 A error ellipse = (172.9, 0.0, 3.7; 82.9, 0.0, 2.1; 0.0, 0.0, 0.0) mb = 0.0 ( 0) ML = 0.0 ( 0) mblg = 4.0 ( 54) md = 0.0 ( 0) MS = 0.0 ( 0) sta phase arrival res dist azm amp per mag amp per mag sta UALR ePg 04:59:59.26 0.3 0.5 174 UALR eSg 05:00:05.58 S res = 0.4X MIAR ePg 05:00:11.89 -0.7 1.2 234 g:1.7-1 .85 3.1 MIAR eSg 05:00:27.48 S res = -0.5X HBAR ePn 05:00:16.22 -1.6 1.5 78 HBAR QUAR ePn 05:00:16.93 -1.4 1.5 74 QUAR SFTN ePn 05:00:23.44 -0.2 2.0 86 SFTN eSn 05:00:49.70 S res = 1.1X MET ePn 05:00:23.82 -0.8 2.0 93 d:9.4+1 3.9X g:1.6+0 .82 4.3 MET ePg 05:00:27.98 -0.8X eSn 05:00:49.42 S res = -1.0X eSb 05:00:52.37 S res = -0.4X eSg 05:00:54.21 S res = -0.9X DLAR ePn 05:00:25.80 1.1 2.0 73 DLAR eSn 05:00:53.39 S res = 2.9X GNAR ePn 05:00:26.14 0.9 2.1 69 GNAR eSn 05:00:53.64 S res = 2.2X PBMO ePn 05:00:27.77 0.6 2.2 46 g:2.3+0 1.1 4.4 PBMO PVMO ePn 05:00:30.48 -0.5 2.5 61 PVMO eSn 05:01:02.13 S res = 0.4X eSg 05:01:08.03 S res = -1.7X CWPT ePn 05:00:30.62 1.0 2.4 71 CWPT EBZ ePn 05:00:31.22 0.0 2.5 92 EBZ WADM ePn 05:00:31.99 2.3 2.4 62 WADM eSn 05:01:05.02 S res = 5.6X OXF ePn 05:00:32.11 0.0 2.6 106 g:9.8-1 .95 4.1 OXF eSn 05:01:03.50 S res = -0.3X HALT ePn 05:00:32.33 0.0 2.6 74 HALT PARMOePn 05:00:32.69 0.5 2.6 56 PARM ePb 05:00:34.78 -1.7X RELT ePn 05:00:34.04 0.9 2.6 72 RELT ePb 05:00:36.91 -0.8X GLAT ePn 05:00:34.95 0.6 2.7 67 GLAT GLST ePn 05:00:35.06 0.7 2.7 67 GLST TUL1 ePn 05:00:37.04 1.3 2.8 284 g:2.9-1 .75 3.7 TUL1 eSg 05:01:19.36 S res = -1.5X UTMT ePn 05:00:38.74 -0.4 3.1 68 g:3.6-1 .75 3.9 UTMT ePg 05:00:47.21 -1.6X eSg 05:01:26.42 S res = -2.3X VBMS ePn 05:00:43.82 0.2 3.4 152 g:1.4-1 .88 3.4 VBMS SIUC ePn 05:00:46.74 1.1 3.6 45 g:4.6-1 .75 4.0 SIUC eSn 05:01:27.88 S res = -0.2X eSg 05:01:40.77 S res = -3.3X SLM ePn 05:00:48.83 -0.2 3.8 27 d:2.3+2 5.3X g:1.3+0 1.1 4.4 SLM ePg 05:00:58.68 -3.9X eSn 05:01:33.58 S res = -0.5X eSg 05:01:46.86 S res = -5.0X NATX ePn 05:00:51.32 0.1 4.0 209 d:1.4+2 5.0X g:2.0-1 .77 3.7 NATX eSn 05:01:37.65 S res = -0.3X V34A ePn 05:00:55.56 1.0 4.2 279 g:1.3-1 .90 3.5 V34A ePb 05:01:04.15 -0.1X eSn 05:01:44.36 S res = 0.2X eSg 05:02:01.69 S res = -3.2X U34A ePn 05:00:57.04 0.8 4.3 287 g:5.1-1 1.2 4.0 U34A ePb 05:01:06.25 -0.1X ePg 05:01:11.67 -1.1X eSn 05:01:46.84 S res = -0.3X eSg 05:02:05.38 S res = -3.5X W34A ePn 05:00:58.29 1.1 4.4 271 g:1.7-1 .80 3.7 W34A ePg 05:01:11.12 -2.8X eSn 05:01:47.43 S res = -1.3X eSg 05:02:08.36 S res = -2.5X USIN ePn 05:01:01.64 0.6 4.7 53 g:6.1-1 1.3 4.1 USIN ePg 05:01:15.56 -3.9X eSn 05:01:56.59 S res = 0.8X eSg 05:02:13.69 S res = -6.4X OLIL ePn 05:01:03.47 -0.6 4.9 44 g:6.1-1 1.0 4.2 OLIL ePg 05:01:18.48 -5.1X eSg 05:02:22.59 S res = -4.5X LRAL ePn 05:01:05.20 -0.3 5.0 115 LRAL eSn 05:02:02.95 S res = -0.8X eSg 05:02:22.40 S res = -8.1X KSU1 ePn 05:01:07.21 0.3 5.1 320 g:5.6-1 .85 4.3 KSU1 ePg 05:01:23.32 -4.2X eSg 05:02:28.89 S res = -4.7X WMOK ePn 05:01:09.56 0.5 5.3 266 g:1.6-1 .85 3.8 WMOK ePg 05:01:24.88 -5.6X eSn 05:02:09.29 S res = -0.7X eSg 05:02:33.65 S res = -4.9X SWET ePn 05:01:09.62 -0.1 5.3 89 g:2.1-1 .80 3.9 SWET WHTX ePn 05:01:10.76 0.9 5.3 234 g:5.0-2 .93 3.2 WHTX WCI ePn 05:01:15.84 0.2 5.7 57 g:1.9-1 .70 4.0 WCI ePg 05:01:33.92 -5.8X eSn 05:02:22.06 S res = 0.1X eSb 05:02:39.04 S res = -0.5X eSg 05:02:47.19 S res = -6.9X HDIL ePn 05:01:16.71 -0.3 5.8 24 g:7.1-1 .90 4.5 HDIL ePg 05:01:35.63 -6.0X eSn 05:02:23.77 S res = -0.6X eSg 05:02:49.65 S res = -7.7X BLO ePn 05:01:20.74 -0.1 6.1 48 g:3.8-1 .88 4.2 BLO eSn 05:02:28.14 S res = -3.0X eSg 05:02:57.17 S res = -8.9X CPCT ePn 05:01:25.03 -0.4 6.4 86 CPCT ABTX ePn 05:01:26.84 -0.1 6.6 248 g:6.0-2 .88 3.5 ABTX ePg 05:01:50.89 -4.5X eSn 05:02:42.25 S res = 0.1X eSg 05:03:14.06 S res = -6.3X SFIN ePn 05:01:27.94 0.2 6.6 38 g:4.5-1 .88 4.4 SFIN eSn 05:02:44.20 S res = 0.6X eSg 05:03:12.36 S res = -10.1X SCIA ePn 05:01:28.26 -0.2 6.7 355 g:2.9-1 .75 4.3 SCIA ePg 05:01:48.89 -8.8X eSg 05:03:17.92 S res = -6.2X CBKS ePn 05:01:31.50 0.5 6.9 303 g:2.6-1 .95 4.1 CBKS ePg 05:01:55.84 -5.3X eSg 05:03:27.06 S res = -2.8X TKL ePn 05:01:33.52 -0.3 7.1 84 g:1.7-1 .90 4.0 TKL TZTN ePn 05:01:38.00 0.8 7.3 77 d:2.8+1 4.9X g:1.9-1 .83 4.1 TZTN eSn 05:02:59.96 S res = -0.6X eSg 05:03:38.94 S res = -5.4X GOGA ePn 05:01:40.77 -0.7 7.6 101 g:1.4-1 .80 4.0 GOGA ePg 05:02:06.84 -8.9X eSg 05:03:45.21 S res = -9.3X BGNE ePn 05:01:41.07 -0.5 7.6 325 g:5.8-1 1.2 4.4 BGNE ePg 05:02:08.89 -6.9X eSg 05:03:48.32 S res = -6.2X AMTX ePn 05:01:41.47 0.0 7.6 270 g:1.2-1 .77 4.0 AMTX ePg 05:02:09.90 -5.7X eSn 05:03:06.70 S res = -1.5X JFWS ePn 05:01:43.60 -0.8 7.8 12 g:2.0-1 .93 4.1 JFWS ePg 05:02:12.03 -7.8X eSg 05:03:51.18 S res = -10.1X JCT ePn 05:01:43.82 -0.6 7.8 235 g:4.0-2 .77 3.5 JCT eSn 05:03:12.50 S res = -1.0X TIGA ePn 05:01:51.19 0.4 8.3 115 g:1.7-1 .95 4.1 TIGA ePg 05:02:25.70 -3.0X eSn 05:03:23.09 S res = -1.8X eSg 05:04:04.55 S res = -11.7X MSTX ePn 05:01:55.22 -0.4 8.6 264 g:8.0-2 1.1 3.7 MSTX ACSO ePn 05:01:58.68 -1.3 9.0 54 d:3.9+1 5.8X g:1.0-1 .80 4.0 ACSO eSn 05:03:33.92 S res = -7.4X eLg 05:04:27.92 KSCO ePn 05:02:00.22 -0.1 9.0 298 KSCO eLg 05:04:34.77 ECSD ePn 05:02:00.99 -0.4 9.1 340 g:6.0-2 .85 3.7 ECSD eSn 05:03:41.96 S res = -1.9X eLg 05:04:29.88 OGNE ePn 05:02:06.69 -0.3 9.5 310 g:1.9-1 .75 4.3 OGNE eLg 05:04:49.47 BLA ePn 05:02:11.66 -0.9 9.9 75 d:2.4+1 5.7X g:1.0-1 .82 4.0 BLA eSn 05:04:02.00 S res = -1.9X eLg 05:05:06.24 T25A ePn 05:02:12.37 -0.4 9.9 284 g:2.5-1 1.0 4.3 T25A SDCO ePn 05:02:25.96 0.2 10.8 287 SDCO eLg 05:05:29.20 TX31 ePn 05:02:29.45 -1.3 11.2 241 TX31 MNTX ePn 05:02:32.40 -0.9 11.4 256 MNTX eSn 05:04:36.65 S res = -4.4X ISCO ePn 05:02:33.90 0.0 11.4 297 ISCO eLg 05:05:49.50 N23A ePn 05:02:43.52 1.0 12.1 302 N23A LAO ePn 05:03:26.94 -1.4 15.4 322 LAO eLg 05:07:59.69 YMS ePn 05:03:41.19 -1.9 16.6 308 YMS eSn 05:06:54.79 S res = 7.5X YPP ePn 05:03:50.35 5.0X 16.7 308 YPP eSn 05:06:54.89 S res = 3.2X eS 05:07:00.49 S res = -2.5X KMSC eLg 05:04:10.48 129.X 9.1 88 d:5.3+1 6.1X g:1.5-1 1.0 4.1 KMSC AAM eLg 05:04:52.68 161.X 9.8 42 d:2.2+1 5.6X g:1.8-1 1.0 4.2 AAM NHSC eLg 05:04:58.78 159.X 10.4 98 g:4.9-2 .78 3.8 NHSC COWI eLg 05:05:36.10 186.X 11.1 12 g:1.4-1 1.0 4.2 COWI GLMI eLg 05:05:43.26 191.X 11.3 30 g:4.1-1 .93 4.7 GLMI SSPA eLg 05:06:24.77 214.X 12.7 61 SSPA EYMN eLg 05:06:25.70 214.X 12.7 3 g:7.4-2 1.0 4.0 EYMN MVCO eLg 05:06:40.50 223.X 13.1 283 MVCO K22A eLg 05:06:48.79 230.X 13.2 308 K22A PV01 eLg 05:06:50.32 231.X 13.3 287 PV01 BW06 eLg 05:07:55.03 268.X 15.3 305 g:2.5-2 .95 3.7 BW06 DGMT eLg 05:07:56.35 263.X 15.8 330 g:3.8-2 1.2 3.8 DGMT RLMT eLg 05:08:19.13 281.X 16.2 313 g:3.9-2 1.1 3.9 RLMT REDW eLg 05:08:25.08 284.X 16.4 305 g:1.8-2 1.1 3.5 REDW LOHW eLg 05:08:29.25 289.X 16.3 306 g:1.5-2 1.0 3.5 LOHW SNOW eLg 05:08:30.24 289.X 16.4 306 g:2.3-2 .98 3.7 SNOW IMW eLg 05:08:34.53 290.X 16.7 307 g:1.5-2 1.0 3.5 IMW FLWY eLg 05:08:45.74 302.X 16.6 308 g:4.5-2 1.2 3.9 FLWY Generated 2011 FEB 18 at 06:40 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver