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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     19 MAR 2009  ( 78)

     ot  = 02:32:42.64   +/-   0.41              NIAS REGION, INDONESIA          
     lat =       1.677   +/-    6.7
     lon =      96.954   +/-    6.1              MAGNITUDE 4.7 (GS)       
     dep =        35.0  (geophysicist)

     205 km (125 miles) W of Sibolga, Sumatra, Indonesia
     280 km (175 miles) SW of Medan, Sumatra, Indonesia
     550 km (340 miles) WSW of KUALA LUMPUR, Malaysia
     1395 km (860 miles) NW of JAKARTA, Java, Indonesia

     nph =   25 of  29    se = 0.65    FE=705                            A   

     error ellipse = (217.4,  0.0,  9.8;127.4,  0.0,  6.8;  0.0,  0.0,  0.0)

 mb = 4.5 ( 19)  ML = 3.8 (  2)  mblg = 3.2 (  2)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 IPM  ePn     02:33:55.05   0.0    5.0  55 L:9.0-2 .50 3.8  g:6.0-2 1.1 3.2  IPM 
 KULM ePn     02:33:57.50   0.2    5.1  46 L:1.0-1 1.0 3.9  g:4.0-2 .75 3.2  KULM
 KKM  eP      02:37:09.28   0.0   19.7  77 b:1.3+1 .90 4.2                   KKM 
 KAPI eP      02:37:50.98  -0.9   23.7 106 b:1.4+1 1.0 4.4                   KAPI
 ENH  eP      02:38:54.46  -1.0   30.8  21 b:1.4+1 .48 5.0                   ENH 
 MBWA eP      02:39:05.26   1.1   31.8 137 b:4.3+0 .80 4.4                   MBWA
 BJT  eP      02:40:31.06   0.8   42.0  22 b:2.4+1 .75 5.1                   BJT 
      epP     02:40:39.17  depth =  27.2X
 WRAB eP      02:40:34.02  -0.9   42.5 122 b:4.2+0 .65 4.3                   WRAB
 FORT eP      02:40:45.89   0.6   43.8 140 b:1.1+1 .58 4.8                   FORT
 TKM2 eP      02:40:56.98  -0.3   45.3 338 b:8.4+0 1.1 4.5                   TKM2
 AAK  eP      02:40:59.06   0.4   45.5 337 b:4.5+1 1.4 5.2                   AAK 
 EKS2 eP      02:41:02.20   1.2   45.8 336 b:4.4+0 .75 4.5                   EKS2
 MK31 eP      02:41:08.27   0.0   46.7 346                                   MK31
 ULN  eP      02:41:09.47   0.2   46.8   9 b:8.2+0 1.1 4.6                   ULN 
 TLY  eP      02:41:35.28   0.8   50.1   5 b:5.4+0 .70 4.7                   TLY 
 HIA  eP      02:41:42.97  -0.1   51.3  19 b:7.3+0 .80 4.7                   HIA 
 KURK eP      02:41:43.25   0.3   51.3 345 b:1.2+1 1.3 4.7                   KURK
      epP     02:41:52.09  depth =  29.4X
 ZAA0 eP      02:41:56.11  -0.1   53.1 351                                   ZAA0
      epP     02:42:05.16  depth =  29.7X
 BRVK eP      02:42:15.57  -0.5   55.8 341 b:8.3+0 1.4 4.6                   BRVK
 ABKAReP      02:42:24.07  -0.6   57.0 332 b:3.7+0 .68 4.5                   ABKA
      epP     02:42:32.63  depth =  27.9X
 YAK  eP      02:43:18.60  -0.5   65.0  16                                   YAK 
 BR131eP      02:43:41.44  -1.1   68.6 312 b:6.6-1 .57 3.9                   BR13
 BUR08eP      02:44:29.62   0.2   76.5 319                                   BUR0
 PSZ  eP      02:44:49.16   0.1   80.1 318 b:2.2+0 .74 4.2                   PSZ 
 MORC eP      02:44:58.60   0.0   81.9 320 b:4.6+0 1.1 4.4                   MORC



 Generated 2009 MAR 19 at 04:50 UTC

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


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