Phase Data

Explanation of Parameters


     20 FEB 2013  ( 51)

     ot  = 07:30:43.09   +/-   3.28              OAXACA, MEXICO                  
     lat =      16.949   +/-   13.8
     lon =     -94.236   +/-   10.5              MAGNITUDE 4.3 (GS)       
     dep =       149.2   +/-   10.4   

     108 km (67 miles) NNW of Tonala, Chiapas, Mexico (pop 31,000)
     121 km (75 miles) W of Tuxtla Gutierrez, Chiapas, Mexico (pop 490,000)
     473 km (294 miles) WNW of GUATEMALA, Guatemala
     588 km (365 miles) ESE of MEXICO CITY, D.F., Mexico

     nph =   69 of  82    se = 1.62    FE=060                            A   

     error ellipse = ( 37.0,  5.0, 26.0;157.0, 79.0, 15.9;306.0,  8.0,  4.3)

 mb = 4.3 ( 53)  ML = 4.8 (  6)  mblg = 0.0 (  0)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 CCIG ePn     07:31:19.43  -0.3    2.1 108 L:8.8+0 .85 4.8                   CCIG
      eSn     07:31:46.56  S res =  -1.4 
 LVIG ePn     07:31:31.81  -4.4    3.5 323                                   LVIG
      eSn     07:32:09.15  S res =  -8.3X
 UNM  ePn     07:31:59.03  -1.3    5.3 298 L:1.4+0 1.1 5.0                   UNM 
      eSn     07:32:36.26  S res = -24.2X
 MYIG ePn     07:32:08.35   0.8    5.8  46                                   MYIG
 TEIG ePn     07:32:12.32  -4.5X   6.5  59                                   TEIG
 MOIG ePn     07:32:23.86  -1.4    7.1 293                                   MOIG
 ESTN ePn     07:32:44.04   0.6    8.5 116 L:1.3-1 1.9 4.8                   ESTN
 LNIG ePn     07:32:53.28  -0.5    9.3 329                                   LNIG
 ZAIG ePn     07:32:57.43  -2.6    9.7 308                                   ZAIG
 ESPN ePn     07:33:12.33  -0.3   10.7 115                                   ESPN
 JTS  ePn     07:33:18.42  -0.5   11.2 125                                   JTS 
      eSn     07:35:22.81  S res =   0.1 
 HDC  ePn     07:33:29.55  -0.4   12.0 124                                   HDC 
 833A ePn     07:33:34.26   1.2   12.3 338                                   833A
 FSCY ePn     07:33:35.52  -2.1   12.6  77                                   FSCY
 435B ePn     07:33:59.20   2.8   14.1 348                                   435B
 JCT  ePn     07:34:01.53   1.5   14.4 340                                   JCT 
 NATX ePn     07:34:04.73   0.3   14.8 359                                   NATX
 TX31 ePn     07:34:07.97  -0.7   15.1 327                                   TX31
      ePn     07:34:08.27  -0.2 
 061Z ePn     07:34:08.20  -2.4   15.3  52 b:1.1+2 1.0 5.2                   061Z
 WHTX ePn     07:34:11.82   1.1   15.3 350 b:3.8+1 .75 4.8                   WHTX
 MTDJ ePn     07:34:18.92  -0.9   16.0  83 b:7.7+1 1.1 4.9                   MTDJ
 Z41A ePn     07:34:24.28   0.9   16.3   4 b:8.1+1 1.1 4.9                   Z41A
 ABTX ePn     07:34:24.44   0.2   16.4 344 b:3.2+1 .60 4.8                   ABTX
 250A eP      07:34:26.42  -0.8   16.6  24 b:3.1+1 .65 4.8                   250A
 WLAR eP      07:34:29.49   1.4   16.7   3 b:8.5+1 1.1 5.0                   WLAR
 147A eP      07:34:29.52   3.0   16.6  18 b:3.5+1 .55 4.9                   147A
 CCAR eP      07:34:33.03   1.2   17.0   7 b:2.3+1 .78 4.6                   CCAR
 MIAR eP      07:34:34.76  -2.5   17.5   2 b:9.3+0 .80 4.2                   MIAR
 X40A eP      07:34:38.71   1.7   17.5   4 b:1.2+1 .95 4.2                   X40A
 456A eP      07:34:39.74   1.0   17.7  37 b:1.1+2 1.1 5.1                   456A
 Z50A eP      07:34:40.82  -0.3   17.9  23 b:9.8+0 .65 4.3                   Z50A
 MNTX eP      07:34:40.92   0.3   17.8 328 b:3.0+0 .90 3.6                   MNTX
 152A eP      07:34:41.98   1.1   17.9  27 b:1.1+1 .70 4.3                   152A
 Y49A eP      07:34:42.22  -2.9   18.3  21 b:8.8+0 .95 4.1                   Y49A
 W39A eP      07:34:42.35  -2.0   18.2   1 b:2.5+1 .80 4.6                   W39A
 W41B eP      07:34:42.78  -2.2   18.2   5 b:1.2+1 1.0 4.2                   W41B
 WMOK eP      07:34:43.26  -1.1   18.2 348 b:6.8+0 .75 4.1                   WMOK
 OXF  eP      07:34:43.29   0.7   18.0  13 b:1.7+1 .60 4.5                   OXF 
 WHAR eP      07:34:44.18  -2.0   18.3   5 b:1.5+1 .98 4.3                   WHAR
 154A eP      07:34:44.77  -3.7X  18.6  31 b:4.0+1 .95 4.7                   154A
 X48A eP      07:34:48.27  -0.5   18.6  19 b:5.5+0 1.1 3.8                   X48A
 MSTX eP      07:34:48.47  -0.6   18.6 337 b:1.7+1 1.1 4.3                   MSTX
 TUL1 eP      07:34:51.97  -0.6   18.9 356 b:8.2+0 .70 4.2                   TUL1
 AMTX eP      07:34:53.22  -0.8   19.1 341 b:1.5+1 .50 4.6                   AMTX
 HHAR eP      07:34:53.83  -2.3   19.3   1 b:1.7+1 1.1 4.3                   HHAR
 GOGA eP      07:34:54.20   0.4   19.0  29 b:1.9+1 .85 4.5                   GOGA
 Y52A eP      07:34:56.22   1.1   19.2  27 b:1.6+1 .95 4.3                   Y52A
 319A eP      07:35:03.85   1.4   19.8 319 b:1.3+1 .90 4.3                   319A
 BNM  eP      07:35:09.47   0.6   20.4 329                                   BNM 
 LENM eP      07:35:11.71   0.9   20.6 329                                   LENM
 LAZ  eP      07:35:12.39   0.7   20.7 329                                   LAZ 
 ANMO eP      07:35:15.49   0.6   21.0 331 b:3.2+0 1.0 3.7                   ANMO
 T25A eP      07:35:26.10   0.2   22.0 338 b:3.5+0 .70 3.9                   T25A
 KSU1 eP      07:35:29.69   2.6   22.2 355 b:1.0+1 .85 4.3                   KSU1
 OTAV eP      07:35:35.16   1.8   22.8 135 b:2.8+0 .85 3.7                   OTAV
 SDV  eP      07:35:45.11  -2.4   24.3 106 b:1.2+1 .75 4.5                   SDV 
 PV01 eP      07:35:51.33   1.8   24.6 332 b:4.4+0 1.0 3.9                   PV01
      epP     07:36:25.03  depth =   5.2X
 PV13 eP      07:35:52.64   1.9   24.7 332 b:6.9+0 .98 4.2                   PV13
 PV03 eP      07:35:53.05   1.5   24.8 332 b:4.1+0 .64 4.1                   PV03
 PV11 eP      07:35:53.57   1.6   24.8 332 b:4.3+0 .70 4.1                   PV11
 PV12 eP      07:35:53.74   1.9   24.8 332 b:8.4+0 1.1 4.2                   PV12
      epP     07:36:27.29  depth =   4.8X
 PV23 eP      07:35:55.38   1.7   25.0 332 b:8.8+0 1.0 4.2                   PV23
      epP     07:36:25.84  depth =   1.4 
 XPFO eP      07:36:07.57   5.5X  26.0 314 b:5.6+1 .25 5.8                   XPFO
 PV04 epP     07:36:28.18   4.6X  24.9 332                                   PV04
 SMCO epP     07:36:28.96   7.0X  24.8 336                                   SMCO
 HPIG eSn     07:36:31.00 -12.1X  14.5 315                                   HPIG
 SNOW eP      07:36:36.86  -0.4   29.9 336 b:3.6+0 .90 4.1                   SNOW
 JLU  epP     07:36:44.78  -5.5X  27.9 331                                   JLU 
 BEKR eP      07:36:54.10  -3.0X  32.2 321 b:1.3+1 .74 4.8                   BEKR
 F10A eP      07:37:17.65  -1.1   34.7 331 b:4.7+0 1.1 4.1                   F10A
 LPAZ eP      07:38:18.62  -0.9   41.9 141 b:4.0+0 .80 4.1                   LPAZ
 YKW3 eP      07:39:01.04  -3.7X  47.8 347 b:2.6+0 .80 4.0                   YKW3
 INK  eP      07:40:11.25  -1.6   57.0 344 b:5.7+0 1.1 4.4                   INK 
 PLCA eP      07:40:44.95   1.1   61.5 160 b:1.4+1 1.0 4.8                   PLCA



 Generated 2013 FEB 20 at 07:48 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver