Phase Data

Explanation of Parameters


      9 APR 2013  ( 99)

     ot  = 00:32:24.94   +/-   2.06              NEAR COAST OF NORTHERN PERU     
     lat =      -5.717   +/-    7.1
     lon =     -80.240   +/-   15.2              MAGNITUDE 4.2 (GS)       
     dep =        36.2   +/-   10.7   

     72 km (45 miles) SE of Piura, Peru (pop 308,000)
     125 km (77 miles) NNW of Chiclayo, Peru (pop 469,000)
     637 km (396 miles) SSW of QUITO, Ecuador
     784 km (487 miles) NNW of LIMA, Peru

     nph =   21 of  22    se = 1.01    FE=109                            A   

     error ellipse = ( 86.0, 14.0, 23.8;319.0, 67.0, 16.1;180.0, 17.0, 10.2)

 mb = 4.2 ( 16)  ML = 0.0 (  0)  mblg = 3.7 (  5)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 OTAV ePn     00:34:00.26   6.1    6.2  17 g:5.0-2 .75 3.4                   OTAV
 NNA  ePn     00:34:05.60  -0.5    7.1 152 g:1.9-1 .75 4.0                   NNA 
      eSn     00:35:19.02  S res =  -6.4 
 PAYG ePn     00:35:03.17   0.4   11.2 296                                   PAYG
      eSn     00:37:00.89  S res =  -6.1 
 LPAZ ePn     00:36:06.62   0.5   15.9 133 b:8.4+0 1.0 3.8                   LPAZ
 JTS  ePn     00:36:15.04   0.2   16.6 344 b:3.0+0 .85 3.5                   JTS 
 SDV  ePn     00:36:20.19  -4.8   17.4  34 b:4.9+0 1.0 3.6                   SDV 
 PB11 ePn     00:36:22.91  -1.6   17.3 145 b:9.6+0 1.0 3.9                   PB11
 GO01 ePn     00:36:28.70   1.4   17.5 143 b:1.3+1 1.1 4.0                   GO01
 PB01 eP      00:36:37.16  -0.7   18.5 147 b:9.3+0 1.0 3.9                   PB01
 CSGN eP      00:36:53.65  -0.4   19.9 339                                   CSGN
 LVC  eP      00:36:56.25   0.8   20.0 148 b:1.0+1 1.0 4.1                   LVC 
 PTGA eP      00:37:04.26   0.5   20.8  77 b:2.2+1 .80 4.6                   PTGA
 GO02 eP      00:37:14.82  -0.2   21.9 153 b:1.3+1 1.0 4.3                   GO02
 CRPR eP      00:38:02.33  -4.0   27.3  28 b:4.9+1 1.1 5.1                   CRPR
 ANMO eP      00:40:57.38   1.3   47.4 330 b:1.8+0 .60 4.2                   ANMO
 Q24A epP     00:41:26.87  -0.3   50.1 335                                   Q24A
 BW06 eP      00:41:54.48   0.6   55.1 334 b:5.2+0 .90 4.6                   BW06
 AGMN eP      00:41:56.97   0.7   55.5 347 b:5.8+0 .70 4.7                   AGMN
 MDPB eP      00:41:58.07  -4.3X  56.3 323 b:2.0+1 1.0 5.1                   MDPB
 INK  eP      00:44:43.77   0.0   82.6 343 b:2.7+0 .95 4.3                   INK 



 Generated 2013 APR  9 at 01:07 UTC

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