Phase Data

Explanation of Parameters


     20 FEB 2013  ( 51)

     ot  = 08:03:47.72   +/-   1.38              GUERRERO, MEXICO                
     lat =      16.768   +/-   19.4
     lon =     -98.601   +/-   17.4              MAGNITUDE 4.2 (GS)       
     dep =        38.3   +/-   14.9   

     129 km (80 miles) SE of Chilpancingo, Guerrero, Mexico (pop 166,000)
     137 km (85 miles) E of Acapulco, Guerrero, Mexico (pop 616,000)
     145 km (90 miles) SW of Huajuapan de Leon, Oaxaca, Mexico (pop 45,000)
     299 km (186 miles) SSE of MEXICO CITY, D.F., Mexico

     nph =   54 of  54    se = 0.68    FE=058                            B   

     error ellipse = (197.0, 27.0, 32.7; 99.0, 15.0, 26.3;342.0, 57.0, 18.1)

 mb = 4.2 ( 41)  ML = 4.8 (  2)  mblg = 3.7 (  4)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 UNM  ePn     08:04:28.32   0.7    2.6 348 L:7.8+0 1.7 4.8  g:2.4+0 .80 4.6  UNM 
 LVIG ePn     08:04:42.09   1.1    3.6  35 g:2.8-1 1.0 3.8                   LVIG
 MOIG ePn     08:04:44.41   0.4    3.8 320                                   MOIG
 TX31 ePn     08:06:54.57  -0.3   13.4 340                                   TX31
      ePn     08:06:55.17   0.4 
 JCT  ePn     08:07:00.28   0.8   13.7 356                                   JCT 
 WHTX ePn     08:07:22.12   2.6   15.2   4 b:1.7+1 .75 4.4                   WHTX
 MNTX ePn     08:07:30.60  -0.6   16.1 339 b:4.1+0 1.1 3.5                   MNTX
 GDL2 ePn     08:07:31.94  -1.1   16.2 342                                   GDL2
 MSTX ePn     08:07:48.32  -1.1   17.5 348 b:1.3+1 .85 4.1                   MSTX
 AMTX eP      08:07:57.92  -0.1   18.3 352 b:1.0+1 .70 4.1                   AMTX
 W39A eP      08:08:04.92   0.4   18.8  12 b:1.2+1 .85 4.1                   W39A
 TUL1 eP      08:08:08.47  -0.2   19.2   7 b:1.5+1 .80 4.3                   TUL1
 ANMO eP      08:08:10.54  -0.4   19.4 340 b:3.7+0 1.1 3.5                   ANMO
 X16A eP      08:08:27.92  -0.3   21.0 329 b:1.1+1 .85 4.3                   X16A
 T25A eP      08:08:29.41   2.0   20.9 347 b:1.2+1 .90 4.3                   T25A
 WUAZ eP      08:08:39.09   1.6   21.9 331 b:1.8+1 1.0 4.4                   WUAZ
 MVCO eP      08:08:39.79  -0.8   22.2 339 b:9.9+0 .85 4.3                   MVCO
 S22A eP      08:08:40.42   0.2   22.1 343 b:5.2+0 1.0 3.9                   S22A
 PV13 eP      08:08:50.97   0.2   23.1 339 b:4.5+0 .92 3.9                   PV13
 PV03 eP      08:08:52.55   0.8   23.2 339 b:3.0+0 .92 3.8                   PV03
 SMCO eP      08:08:54.74   0.0   23.5 344 b:4.7+0 .95 4.0                   SMCO
 ISCO eP      08:08:56.70  -0.2   23.8 347 b:3.0+0 .80 3.9                   ISCO
 P42A eP      08:08:56.85  -0.6   23.8  16 b:1.6+1 .90 4.5                   P42A
 MTPU eP      08:09:02.23   0.0   24.3 333 b:7.4+0 .96 4.2                   MTPU
 SRU  eP      08:09:03.58  -0.8   24.6 337 b:1.1+1 .86 4.4                   SRU 
 Q16A eP      08:09:04.79  -0.3   24.7 336 b:8.1+0 .82 4.3                   Q16A
 MSU  eP      08:09:06.72   1.0   24.7 334                                   MSU 
      epP     08:09:13.73  depth =  -2.5 
 O20A eP      08:09:06.75   0.9   24.7 342 b:8.1+0 1.0 4.2                   O20A
 P17A eP      08:09:07.62  -0.3   25.0 337 b:6.6+0 .98 4.2                   P17A
 TMUT eP      08:09:08.44   0.1   25.0 336 b:5.2+0 .72 4.2                   TMUT
 HDIL eP      08:09:08.82   0.5   25.0  17 b:2.5+1 .95 4.8                   HDIL
 MPU  eP      08:09:15.41   0.1   25.8 337 b:3.5+0 .86 4.0                   MPU 
 NLU  eP      08:09:16.75   0.3   25.9 336 b:3.4+0 .94 3.9                   NLU 
 RWWY eP      08:09:17.07   0.5   25.9 345 b:6.9+0 1.1 4.1                   RWWY
 P51A eP      08:09:20.66   0.2   26.4  28 b:2.8+1 1.1 4.8                   P51A
 TCUT eP      08:09:23.28   0.0   26.7 338 b:7.6+0 .90 4.3                   TCUT
 PDAR eP      08:09:30.19  -1.1   27.5 342                                   PDAR
 BW06 eP      08:09:30.82  -0.4   27.5 342 b:5.8+0 1.1 4.1                   BW06
 PD31 eP      08:09:31.12  -0.1   27.5 342                                   PD31
 NV01 eP      08:09:31.82  -0.3   27.6 325                                   NV01
 HVU  eP      08:09:32.64  -0.3   27.7 337 b:3.4+0 .78 4.1                   HVU 
 LOHW eP      08:09:41.01   0.1   28.6 342 b:4.7+0 .85 4.2                   LOHW
 FXWY eP      08:09:42.74   0.5   28.8 341 b:5.8+0 1.1 4.2                   FXWY
 MOOW eP      08:09:43.40   1.0   28.8 342 b:2.9+0 1.1 3.9                   MOOW
 RLMT eP      08:09:50.14   0.2   29.6 345 b:4.4+0 .75 4.3                   RLMT
 HLID eP      08:09:51.55  -0.5   29.9 337 b:2.8+0 1.1 3.9                   HLID
 BEKR eP      08:09:53.32   2.2   29.8 325 b:1.4+1 .94 4.7                   BEKR
 YHH  epP     08:09:58.72  -3.0   29.8 342                                   YHH 
 DLMT eP      08:10:00.91   0.7   30.8 341 b:6.2+0 .95 4.4                   DLMT
 LRM  eP      08:10:11.09  -1.1   32.2 342                                   LRM 
 F10A eP      08:10:18.72  -0.5   33.0 336 b:5.2+0 1.0 4.4                   F10A
 FFC  eP      08:11:01.13  -0.5   38.0 357 b:9.9+0 1.1 4.6                   FFC 



 Generated 2013 FEB 20 at 08:24 UTC

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