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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     15 JUL 2007  (196)

     ot  = 05:27:12.05   +/-   0.78              NIAS REGION, INDONESIA          
     lat =       0.933   +/-   11.8
     lon =      97.606   +/-   19.4                                       
     dep =        24.0  (depth phases)

     155 km (100 miles) WSW of Sibolga, Sumatra, Indonesia (pop 71,000)
     315 km (195 miles) SSW of Medan, Sumatra, Indonesia
     515 km (320 miles) WSW of KUALA LUMPUR, Malaysia
     1275 km (800 miles) NW of JAKARTA, Java, Indonesia

     nph =   13 of  17    se = 0.87    FE=706                            B   

     error ellipse = ( 63.7,  0.0, 28.2;153.7,  0.0, 10.3;  0.0,  0.0,  0.0)

 mb = 4.2 (  3)  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
 CMAR P       05:31:14.55   0.3   17.5   4                                   CMAR
 CHTO eP      05:31:17.21  -1.4   17.8   4 b:1.9+0 .45 3.5                   CHTO
 FITZ P       05:33:49.29  -0.1   33.4 126                                   FITZ
 WRA  P       05:34:58.18   0.1   41.6 122                                   WRA 
      pP      05:35:05.18  depth =  23.5 
 BJT  eP      05:35:05.19   0.4   42.4  21 b:1.2+1 .56 4.8                   BJT 
 ASAR P       05:35:09.75   0.5   42.9 127                                   ASAR
      pP      05:35:16.85  depth =  23.7 
 SONM P       05:35:44.98   0.9   47.3   8                                   SONM
      pP      05:35:52.34  depth =  24.5 
 MK31 eP      05:35:46.42   0.4   47.6 346                                   MK31
 MKAR P       05:35:46.63   0.6   47.6 346                                   MKAR
      pP      05:35:53.83  depth =  24.1 
 BRVK eP      05:36:53.29  -0.2   56.7 341 b:1.7+0 .76 4.2                   BRVK
 ARCESP       05:39:34.85   0.3   82.9 340                                   ARCE
 GERESP       05:39:47.29   0.1   85.3 319                                   GERE
 TXAR PKP     05:46:44.06  -1.9  143.7  32                                   TXAR



 Generated 2007 JUL 29 at 00:01 UTC

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

 


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