Phase Data

Explanation of Parameters


      4 MAR 2013  ( 63)

     ot  = 16:10:03.20   +/-   0.55              NORTHERN SUMATRA, INDONESIA     
     lat =       2.188   +/-    6.7
     lon =      98.822   +/-    7.2              MAGNITUDE 4.6 (GS)       
     dep =       132.1   +/-    5.2   

     49 km (31 miles) N of Sibolga, Sumatra, Indonesia (pop 90,000)
     90 km (56 miles) SSW of Pematangsiantar, Sumatra, Indonesia (pop 229,000)
     338 km (210 miles) WSW of KUALA LUMPUR, Malaysia
     1282 km (796 miles) NW of JAKARTA, Java, Indonesia

     nph =   16 of  18    se = 0.74    FE=706                            A   

     error ellipse = (273.4,  4.0, 11.2;  4.3, 13.2, 10.4;167.0, 76.2,  7.9)

 mb = 4.6 (  5)  ML = 0.0 (  0)  mblg = 0.0 (  0)  md = 3.5 (  2)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 PSI  ePn     16:10:22.42  -0.3    0.5  11 d:8.7+1     3.2  L:6.4-1 1.0 2.5X PSI 
      eSn     16:10:35.32  S res =  -2.2X
 GSI  ePn     16:10:31.58  -0.2    1.5 235 d:1.0+2     3.8                   GSI 
      eSn     16:10:52.31  S res =  -1.2X
 IPM  ePn     16:10:51.66  -0.5    3.2  44 L:4.0-2 1.9 2.8X                  IPM 
 KULM ePn     16:10:56.63  -0.9    3.6  31 L:3.0-2 1.4 2.9X                  KULM
 LHMI ePn     16:10:58.53   1.4    3.6 328 L:2.8-1 .80 3.9X                  LHMI
 CM01 ePn     16:13:43.29   0.7   16.1   0                                   CM01
 CM31 ePn     16:13:43.91   0.9   16.2   0                                   CM31
 KKM  eP      16:14:01.93   0.5   17.8  77 b:8.9+1 1.7 4.8                   KKM 
 WB2  eP      16:17:35.62   0.2   41.2 124                                   WB2 
 WRAB eP      16:17:36.10   0.8   41.2 124 b:2.7+1 .85 5.0                   WRAB
 NRN  eP      16:17:58.85  -0.2   44.1 335 b:1.9+0 .65 3.9                   NRN 
 MK01 eP      16:18:17.94  -0.7   46.7 344                                   MK01
 MK31 eP      16:18:18.42  -0.4   46.7 344                                   MK31
 MAKZ eP      16:18:19.07  -0.5   46.8 344 b:3.3+0 1.1 3.9                   MAKZ
 ZALV eP      16:19:04.57  -0.6   52.9 350                                   ZALV
 BOSA eP      16:21:39.93  -0.3   76.7 240 b:1.1+1 .45 4.9                   BOSA



 Generated 2013 MAR  4 at 17:37 UTC

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