Phase Data

Explanation of Parameters


     31 JAN 2013  ( 31)

     ot  = 04:15:55.65   +/-   2.04              ATACAMA, CHILE                  
     lat =     -27.878   +/-    2.7
     lon =     -70.941   +/-   17.2              MAGNITUDE 4.5 (GS)       
     dep =        26.8   +/-    8.1   

     79 km (49 miles) NNW of Vallenar, Atacama, Chile (pop 43,000)
     82 km (51 miles) SW of Copiapo, Atacama, Chile (pop 125,000)
     233 km (145 miles) N of Coquimbo, Coquimbo, Chile
     618 km (384 miles) N of SANTIAGO, Region Metropolitana, Chile

     nph =   49 of  49    se = 1.00    FE=122                            A   

     error ellipse = ( 97.0,  9.0, 26.8;297.0, 79.0, 11.7;188.0,  3.0,  2.3)

 mb = 4.5 ( 17)  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
 GO03 ePg     04:16:09.89   0.8    0.7  66                                   GO03
      ePn     04:16:10.05   0.4 
      eSg     04:16:19.20  S res =   0.9 
 LCO  ePn     04:16:13.72  -2.5    1.1 169                                   LCO 
      eSn     04:16:26.64  S res =  -4.6 
 GO04 ePn     04:16:31.92   0.0    2.3 177                                   GO04
      eSn     04:16:59.53  S res =   0.2 
 GO02 ePn     04:16:42.36   1.1    3.0  24                                   GO02
      eSn     04:17:14.90  S res =  -1.2 
 PB10 ePn     04:16:58.95  -1.2    4.4   5                                   PB10
      eSn     04:17:48.61  S res =  -1.5 
 ROC1 ePn     04:17:09.66  -0.6    5.1 181                                   ROC1
      eSn     04:18:09.85  S res =   1.6 
 PEL  ePn     04:17:11.84  -0.6    5.3 178                                   PEL 
      eSn     04:18:11.65  S res =  -0.5 
 PB04 ePn     04:17:14.91  -2.0    5.6   8                                   PB04
      eSn     04:18:20.71  S res =   0.6 
 LVC  ePn     04:17:16.92   0.0    5.6  20                                   LVC 
      eSn     04:18:18.48  S res =  -1.6 
 PB01 ePn     04:17:32.81  -2.8    6.9  11                                   PB01
 GO05 ePn     04:17:35.32  -3.3    7.2 187                                   GO05
      eSn     04:18:56.53  S res =  -2.5 
 PB11 ePn     04:17:49.10  -3.5    8.2   9                                   PB11
      eSn     04:19:24.16  S res =   0.0 
 MNMC ePn     04:17:58.82  -2.5    8.8   8                                   MNMC
      eSn     04:19:37.57  S res =  -2.2 
 GO06 ePn     04:18:41.06   0.4   11.7 182                                   GO06
 LPAZ ePn     04:18:41.92  -1.2   11.8  13                                   LPAZ
 CPUP ePn     04:18:47.50  -0.5   12.2  86                                   CPUP
 PLCA ePn     04:18:55.83  -0.5   12.8 179                                   PLCA
 BDFB eP      04:21:09.72  -3.1   24.5  65 b:9.3+0 1.0 4.3                   BDFB
 PTGA eP      04:21:52.43  -0.7   29.0  23 b:8.3+0 1.2 4.3                   PTGA
 OBIP eP      04:24:14.69  -0.8   45.8   6 b:3.4+1 1.1 5.2                   OBIP
 SNAA eP      04:25:38.56   0.4   56.9 160 b:1.9+1 1.3 5.0                   SNAA
 JCT  eP      04:26:28.72   0.3   64.2 332 b:7.6+0 .75 4.9                   JCT 
 TX31 eP      04:26:33.30   0.1   65.0 329                                   TX31
 KNB  eP      04:27:40.21   1.9   75.6 327 b:8.7+0 1.3 4.6                   KNB 
 CCUT eP      04:27:43.91   1.7   76.3 326 b:3.3+0 .86 4.4                   CCUT
 PSUT eP      04:27:49.37   1.5   77.3 327 b:4.9+0 1.2 4.4                   PSUT
 JLU  eP      04:27:51.56   0.7   77.8 330 b:3.3+0 .70 4.5                   JLU 
 DUG  eP      04:27:52.92   0.6   78.1 328 b:3.0+0 .80 4.4                   DUG 
 PDAR eP      04:27:55.54  -0.5   78.8 332                                   PDAR
 HWUT eP      04:27:55.81   0.3   78.7 330 b:4.4+0 .65 4.6                   HWUT
 HVU  eP      04:27:59.40   0.2   79.4 329 b:4.4+0 .76 4.6                   HVU 
 ELK  eP      04:28:01.22   0.1   79.7 327 b:3.3+0 .80 4.4                   ELK 
 HLID eP      04:28:11.15   0.4   81.5 330 b:2.6+0 .85 4.3                   HLID
 ORV  eP      04:28:13.57   0.6   82.0 323 b:3.3+0 1.0 4.3                   ORV 
 J08A eP      04:28:20.17   0.5   83.2 327 b:1.4+1 1.5 4.9                   J08A
 PINE eP      04:28:27.53   0.0   84.8 326 b:5.6+0 .95 4.8                   PINE



 Generated 2013 JAN 31 at 04:33 UTC

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