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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     25 APR 2009  (115)

     ot  = 18:41:07.43   +/-   0.37              HALMAHERA, INDONESIA            
     lat =       2.571   +/-    5.7
     lon =     128.349   +/-   10.9              MAGNITUDE 4.4 (GS)       
     dep =       171.0  (depth phases)

     225 km (140 miles) NNE of Ternate, Moluccas, Indonesia
     405 km (255 miles) ENE of Manado, Sulawesi, Indonesia
     1560 km (970 miles) SSE of MANILA, Philippines
     2580 km (1600 miles) ENE of JAKARTA, Java, Indonesia

     nph =   20 of  28    se = 0.86    FE=267                            A   

     error ellipse = ( 83.3,  0.0, 14.4;173.3,  0.0,  7.4;  0.0,  0.0,  0.0)

 mb = 4.4 ( 15)  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
 KAPI ePn     18:43:44.93  -0.8   11.4 229 g:1.5-2 .65 3.4X b:3.0+1 .60 5.0  KAPI
      eSn     18:45:46.49  S res =  -6.1X
 WRAB eP      18:45:58.76   0.1   23.1 165 g:1.7-2 .65 4.0X b:1.9+1 .60 4.8  WRAB
      eS      18:49:59.46  S res =   2.3X
 MBWA qP      18:46:15.46  -0.6   25.0 199                                   MBWA
 AS31 eP      18:46:30.33   0.0   26.6 169                                   AS31
 CTAO qP      18:46:46.95  -0.6   28.6 143 b:4.1+0 .89 4.2                   CTAO
 MAJO eP      18:47:41.53  -2.1   35.0  14 b:1.1+1 .70 4.6                   MAJO
 STKA eP      18:47:56.94   0.6   36.5 161 b:4.2+0 .75 4.2                   STKA
 NWAO eP      18:47:59.00  -0.2   36.8 196 b:2.5+1 1.3 4.7                   NWAO
 MDJ  eP      18:48:40.85   0.0   41.9   1 b:1.1+1 1.0 4.4                   MDJ 
 LSA  eP      18:49:03.71   1.8   44.4 311 b:3.1+0 .50 4.1                   LSA 
 ULN  eP      18:49:35.50   0.7   48.7 341 b:8.0+0 1.1 4.2                   ULN 
      epP     18:50:12.07  depth = 162.0 
 MK31 eP      18:50:52.40   0.3   59.4 325                                   MK31
      epP     18:51:32.87  depth = 173.8 
 ZAA0 qP      18:51:10.82  -0.8   62.3 333                                   ZAA0
 KBL  qP      18:51:19.62  -0.3   63.5 308                                   KBL 
 KURK eP      18:51:19.81   0.0   63.6 327 b:9.1+0 .60 4.8                   KURK
      ePcP    18:51:53.04  -1.7X
      epP     18:52:00.29  depth = 171.5 
 BRVK eP      18:51:55.21  -0.5   69.2 327 b:7.6+0 .95 4.5                   BRVK
      qpP     18:52:37.42  depth = 176.6 
 CASY eP      18:51:59.97   0.6   69.9 188 b:9.0+0 1.0 4.5                   CASY
 VNDA eP      18:53:08.85   0.6   82.1 173 b:4.8+0 .78 4.3                   VNDA
 PMR  eP      18:53:19.80   0.5   84.2  28 b:7.9+0 .93 4.5                   PMR 
 MCK  eP      18:53:21.42   0.6   84.5  26 b:4.2+0 .83 4.3                   MCK 
 MALT qP      18:53:36.31  -4.0X  88.4 308                                   MALT



 Generated 2009 APR 25 at 21:46 UTC

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


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