Phase Data

Explanation of Parameters


     17 MAR 2013  ( 76)

     ot  = 12:55:19.35   +/-   1.74              OFF COAST OF CHIAPAS, MEXICO    
     lat =      14.011   +/-   13.1
     lon =     -93.013   +/-   13.0              MAGNITUDE 4.2 (GS)       
     dep =        40.4   +/-    9.1   

     128 km (79 miles) SW of Tapachula, Chiapas, Mexico (pop 189,000)
     185 km (115 miles) WSW of Quetzaltenango, Guatemala
     276 km (172 miles) WSW of GUATEMALA, Guatemala
     887 km (551 miles) SE of MEXICO CITY, D.F., Mexico

     nph =   28 of  28    se = 0.86    FE=069                            A   

     error ellipse = (149.0, 21.0, 21.3;240.0,  3.0, 19.9;340.0, 68.0, 12.3)

 mb = 4.2 ( 20)  ML = 0.0 (  0)  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     12:55:55.45  -1.0    2.4  20                                   CCIG
      eSn     12:56:28.86  S res =   4.0 
 TGUH ePn     12:56:39.81  -0.1    5.6  89                                   TGUH
 TLIG ePn     12:56:50.61  -0.8    6.4 304                                   TLIG
 TEIG ePn     12:57:08.67   0.2    7.7  36                                   TEIG
 TX31 eP      12:59:29.20   0.6   18.2 329 b:3.5+0 1.1 3.4                   TX31
      eP      12:59:29.41   0.7 
 MIAR eP      12:59:55.24   1.8   20.4 359 b:6.8+0 .90 4.0                   MIAR
 GDL2 eP      12:59:56.84  -1.3   20.9 332                                   GDL2
 MNTX eP      12:59:58.38  -0.4   20.9 329 b:2.9+0 .85 3.7                   MNTX
 AMTX eP      13:00:10.76  -1.7   22.2 341 b:8.9+0 .75 4.3                   AMTX
 AGP  eP      13:00:40.83  -1.1   25.3  76 b:1.2+2 1.0 5.4                   AGP 
 T25A eP      13:00:41.29   0.0   25.2 338 b:4.9+0 1.0 4.0                   T25A
 SDCO eP      13:00:50.36   0.4   26.1 337 b:2.8+0 1.1 3.8                   SDCO
 REDW eP      13:01:51.45   0.4   33.0 336 b:7.2+0 .90 4.6                   REDW
 SNOW eP      13:01:51.95   0.5   33.1 336 b:1.4+1 .95 4.8                   SNOW
 NV01 eP      13:01:52.46   1.1   33.0 322                                   NV01
 LKWY eP      13:01:56.77  -1.6   33.9 338 b:2.6+1 .90 5.2                   LKWY
 WDC  eP      13:02:24.27  -0.4   37.0 321 b:2.6+0 1.1 4.0                   WDC 
 YKB5 eP      13:04:14.14  -1.2   50.8 347                                   YKB5
 PTCN eP      13:04:31.93  -0.9   53.1 223 b:1.7+2 .50 6.3                   PTCN
 INK  eP      13:05:22.02  -0.5   60.1 344 b:4.2+0 1.0 4.5                   INK 
 RES  eP      13:05:24.89  -1.2   60.7 359 b:1.3+0 .85 4.1                   RES 
 DOT  eP      13:05:28.13   0.9   60.8 337 b:2.7+0 1.1 4.3                   DOT 
 PAX  eP      13:05:29.39   0.6   61.0 336 b:2.2+0 .96 4.3                   PAX 
 TRF  eP      13:05:43.77   0.3   63.2 335 b:2.5+0 .88 4.3                   TRF 
 TOLK eP      13:05:56.18   0.0   65.2 340 b:8.0-1 .80 3.8                   TOLK
 CM01 ePKPdf  13:14:54.38   0.0  145.7 340                                   CM01



 Generated 2013 MAR 17 at 13:28 UTC

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