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Earthquake Hazards Program
Phase Data

Explanation of Parameters


      8 JUL 2007  (189)

     ot  = 20:49:04.59   +/-   0.40              NIAS REGION, INDONESIA          
     lat =       0.132   +/-    6.4
     lon =      97.047   +/-    6.2              MAGNITUDE 4.4 (GS)       
     dep =        35.0  (geophysicist)

     260 km (160 miles) SW of Sibolga, Sumatra, Indonesia
     385 km (240 miles) WNW of Padang, Sumatra, Indonesia
     615 km (380 miles) WSW of KUALA LUMPUR, Malaysia
     1275 km (790 miles) WNW of JAKARTA, Java, Indonesia
 
     Felt (III) at Gunung Sitoli.

     nph =   27 of  28    se = 0.82    FE=706                            A   

     error ellipse = (222.7,  0.0,  9.6;132.7,  0.0,  6.7;  0.0,  0.0,  0.0)

 mb = 4.4 ( 13)  ML = 0.0 (  0)  mblg = 3.3 (  1)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 KULM ePn     20:50:32.91  -1.6    6.3  35 d:1.3+2     5.8X                  KULM
 KSM  qPn     20:52:11.68   0.3   13.3  84                                   KSM 
 PALK ePn     20:53:07.37  -2.1   17.8 294 b:5.3+1 1.4 4.5                   PALK
 CM31 ePn     20:53:15.52  -0.4   18.3   6 b:7.9+0 .70 4.0                   CM31
 CHTO eP      20:53:19.73   0.1   18.7   6 g:6.7-3 .95 3.3  b:6.7+0 .95 3.8  CHTO
 QIZ  eP      20:54:02.68   0.5   22.6  33 b:1.2+1 .88 4.4                   QIZ 
 LSA  eP      20:55:10.87   0.8   29.9 350 b:2.8+0 .67 4.2                   LSA 
 MBWA qP      20:55:17.12   1.3   30.6 135                                   MBWA
 ENH  qP      20:55:30.14   0.4   32.2  20                                   ENH 
 FITZ eP      20:55:41.04   0.5   33.4 124 b:6.2+0 .74 4.6                   FITZ
 NACB eP      20:55:42.95   0.1   33.7  43                                   NACB
 WB2  eP      20:56:48.52  -1.2   41.6 121                                   WB2 
 WRAB eP      20:56:48.54  -1.2   41.6 121 b:2.5+0 .55 4.2                   WRAB
 UCH  qP      20:57:29.59   0.0   46.6 337                                   UCH 
 TKM2 qP      20:57:31.51   0.8   46.7 338 b:1.0+1 1.4 4.6                   TKM2
 AML  eP      20:57:32.07   0.7   46.8 336 b:2.2+1 1.6 4.9                   AML 
 EKS2 eP      20:57:34.65   0.4   47.2 337 b:2.1+0 .52 4.4                   EKS2
 STKA qP      20:58:16.18  -0.2   52.8 131                                   STKA
 KURK eP      20:58:16.20   0.1   52.8 345 b:3.2+1 3.1 4.8X                  KURK
 ZAA0 eP      20:58:29.95   0.6   54.6 351                                   ZAA0
 BRVK eP      20:58:48.37  -0.2   57.3 341 b:1.5+0 .61 4.2                   BRVK
 KMBO qP      20:59:08.04   0.7   59.8 269                                   KMBO
 YSS  qP      20:59:16.75   0.1   61.3  34                                   YSS 
 ARU  eP      20:59:34.71  -0.3   64.1 337 b:5.2+0 1.1 4.5                   ARU 
 MALT eP      20:59:46.37   0.2   65.7 313 b:6.7+0 1.3 4.6                   MALT
      ePcP    21:00:17.72   0.4X
 MA2  qP      21:00:26.66  -0.1   72.4  26                                   MA2 
 JCT  qPKP    21:08:39.79  -0.2  145.6  26                                   JCT 



 Generated 2007 JUL 18 at 23:41 UTC

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

 


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