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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     16 APR 2009  (106)

     ot  = 20:42:31.72   +/-   0.43              KEP. MENTAWAI REGION, INDONESIA 
     lat =      -3.339   +/-    7.7
     lon =     100.357   +/-    8.8              MAGNITUDE 4.9 (GS)       
     dep =        35.0  (geophysicist)

     215 km (135 miles) WNW of Bengkulu, Sumatra, Indonesia
     265 km (165 miles) S of Padang, Sumatra, Indonesia
     410 km (255 miles) WSW of Jambi, Sumatra, Indonesia
     775 km (480 miles) WNW of JAKARTA, Java, Indonesia

     nph =   33 of  42    se = 1.18    FE=274                            A   

     error ellipse = ( 60.5,  0.0, 12.2;150.5,  0.0,  9.3;  0.0,  0.0,  0.0)

 mb = 4.9 ( 17)  ML = 0.0 (  0)  mblg = 4.0 (  5)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 IPM  eP      20:44:23.54  -0.6    7.9   5 d:2.7+2     7.1X L:1.0-1 .85 4.4X IPM 
                                           g:7.3-2 .85 3.7  b:7.3+1 .85 5.8X
 COCO ePn     20:44:43.29  -2.3    9.5 201 d:1.2+1     4.9X L:2.0-1 .60 4.9X COCO
                                           g:2.7-1 1.0 4.3  b:1.1+2 .60 6.2X
 KSM  ePn     20:45:08.22   1.0   11.0  64 g:7.3-3 1.0 2.9X b:1.2+1 1.2 5.0X KSM 
 KAPI eP      20:46:54.54  -0.6   19.4  96 g:1.2-1 1.2 4.4  b:1.2+2 1.2 5.0  KAPI
 CM31 eP      20:47:18.05  -1.8   21.7 356 g:2.7-2 .98 4.0  b:2.2+1 .90 4.6  CM31
 CHTO eP      20:47:21.76  -1.9   22.1 356 g:1.9-2 1.0 3.8  b:1.9+1 1.0 4.5  CHTO
 WRAB eP      20:49:37.64  -0.9   37.0 119 b:5.6+0 .50 4.7                   WRAB
 AS31 eP      20:49:48.43   0.1   38.2 125                                   AS31
 JNU  eP      20:50:53.48  -1.2   46.4  36 b:4.1+1 1.2 5.3                   JNU 
 CTAO eP      20:51:05.16  -0.4   47.7 114 b:2.3+1 1.2 5.1                   CTAO
      epP     20:51:11.43  depth =  21.0X
 KBL  eP      20:51:06.89   0.6   47.8 325 b:1.0+1 1.1 4.7                   KBL 
 TKM2 eP      20:51:32.68   0.8   51.2 337 b:1.1+3 .65 7.0X                  TKM2
 ULN  eP      20:51:33.23   0.5   51.3   6 b:1.7+0 .75 4.1                   ULN 
      epP     20:51:38.21  depth =  16.6X
      esP     20:51:40.28  -7.1X
 EKS2 eP      20:51:36.35   0.6   51.7 335 b:2.3+1 .93 5.1                   EKS2
 MK31 eP      20:51:41.11   0.5   52.4 344                                   MK31
      epP     20:51:45.90  depth =  15.9X
 MAJO eP      20:51:44.39  -1.5   53.1  38 b:4.8+0 .78 4.5                   MAJO
      epP     20:51:51.34  depth =  22.8X
 KKAR eP      20:51:47.75  -1.0   53.5 333 b:1.8+0 .65 4.2                   KKAR
      epP     20:51:53.84  depth =  20.0X
      esP     20:51:56.08  -7.4X
 KURK eP      20:52:13.84   0.2   57.0 344 b:4.3+1 1.0 5.4                   KURK
 ZAA0 eP      20:52:24.59   0.0   58.5 349                                   ZAA0
 BRVK eP      20:52:45.17  -0.5   61.6 340 b:1.1+1 .95 5.0                   BRVK
      epP     20:52:51.08  depth =  19.2X
      esP     20:52:53.05  -7.5X
 ABKAReP      20:52:54.55  -0.3   63.0 332 b:4.5+1 1.0 5.6                   ABKA
 GNI  eP      20:53:19.69  -0.1   66.7 316 b:1.7+1 1.2 5.0                   GNI 
 MALT eP      20:53:42.29  -0.9   70.5 313 b:1.2+1 1.1 4.9                   MALT
 BUR08eP      20:54:52.14   1.1   82.5 319                                   BUR0
 SUW  eP      20:55:04.92   0.6   85.2 325 b:5.2+1 1.0 5.7                   SUW 
 RSSD ePKPdf  21:01:47.71   1.7  134.0  24                                   RSSD
 WCI  ePKPdf  21:02:03.76  -1.7  144.7   9                                   WCI 
 MIAR ePKPdf  21:02:08.86   0.6  146.4  21                                   MIAR
 GNAR ePKPdf  21:02:10.03   2.2  146.1  15                                   GNAR
 TZTN ePKPdf  21:02:10.24   1.4  146.8   6                                   TZTN
 JCT  ePKPdf  21:02:10.99   1.6  147.0  33                                   JCT 
 OXF  ePKPdf  21:02:11.58   1.1  147.7  15                                   OXF 
 OTAV ePKPdf  21:02:41.16   1.0  176.7 201                                   OTAV



 Generated 2009 APR 19 at 16:12 UTC

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


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