Phase Data

Explanation of Parameters


     23 FEB 2013  ( 54)

     ot  = 10:49:31.94   +/-   2.17              NEAR COAST OF SOUTHERN PERU     
     lat =     -16.066   +/-    9.9
     lon =     -72.348   +/-   15.5              MAGNITUDE 4.1 (GS)       
     dep =        24.6   +/-   10.2   

     94 km (59 miles) WNW of Arequipa, Peru (pop 710,000)
     196 km (122 miles) NW of Moquegua, Peru
     244 km (151 miles) SE of Puquio, Peru
     674 km (419 miles) SE of LIMA, Peru

     nph =   21 of  23    se = 1.07    FE=115                            A   

     error ellipse = (286.0,  5.0, 24.7;188.0, 55.0, 16.6; 20.0, 33.0, 12.6)

 mb = 4.1 (  9)  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
 LPAZ ePn     10:50:32.57  -0.5    4.1  94                                   LPAZ
 MNMC ePn     10:50:33.01   0.7    4.0 140                                   MNMC
 PB11 ePn     10:50:38.61   0.1    4.5 146                                   PB11
      eSn     10:51:28.30  S res =  -1.6 
 PB01 ePn     10:50:54.58   0.2    5.6 152                                   PB01
      eSn     10:51:57.28  S res =  -1.3 
 PB04 ePn     10:51:06.72  -0.5    6.6 162                                   PB04
      eSn     10:52:21.69  S res =   0.2 
 LVC  ePn     10:51:18.00   1.0    7.3 154                                   LVC 
 PB10 ePn     10:51:21.89   0.7    7.6 168                                   PB10
      eSn     10:52:45.67  S res =  -0.9 
 GO02 ePn     10:51:46.89   0.6    9.4 165                                   GO02
 GO03 ePn     10:52:15.95  -0.6   11.6 171                                   GO03
 LCO  ePn     10:52:34.25  -0.8   13.0 174                                   LCO 
 GO04 eP      10:52:59.85   1.8X  14.1 175                                   GO04
 OTAV ePn     10:53:33.16   1.0   17.3 339 b:2.1+1 1.9 3.9                   OTAV
 PTGA eP      10:53:58.17   0.4   19.5  40 b:8.1+0 1.2 3.9                   PTGA
 ROSC eP      10:54:11.62  -1.2   20.9 354 b:5.1+0 1.0 3.9                   ROSC
 GO06 eP      10:54:38.39  -1.4   23.4 178 b:2.7+1 1.7 4.5                   GO06
 SDV  eP      10:54:51.68  -1.2   24.8   4 b:7.6+0 1.1 4.2                   SDV 
 BOAB eP      10:55:49.77  -0.1   31.3 334 b:1.0+1 1.4 4.5                   BOAB
 MTP  eP      10:56:19.25   0.1   34.6  11 b:3.8+1 1.3 5.2                   MTP 
 250A eP      10:58:21.97   0.7X  49.6 344 b:6.0+1 .45 5.9                   250A



 Generated 2013 FEB 23 at 14:12 UTC

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