Phase Data

Explanation of Parameters


     27 MAR 2013  ( 86)

     ot  = 16:39:10.85   +/-   2.44              NORTHERN SUMATRA, INDONESIA     
     lat =       1.423   +/-    7.3
     lon =      99.167   +/-    7.8              MAGNITUDE 4.3 (GS)       
     dep =        34.6   +/-   22.4   

     13 km (8 miles) WNW of Padangsidempuan, Sumatra, Indonesia (pop 178,000)
     56 km (35 miles) SE of Sibolga, Sumatra, Indonesia (pop 90,000)
     341 km (212 miles) SW of KUALA LUMPUR, Malaysia
     1195 km (742 miles) NW of JAKARTA, Java, Indonesia

     nph =   14 of  16    se = 1.11    FE=706                            B   

     error ellipse = (124.1, 85.5, 34.9;235.5,  1.7, 12.5;325.6,  4.2, 10.5)

 mb = 4.3 (  3)  ML = 4.1 (  6)  mblg = 3.3 (  4)  md = 4.3 (  2)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 PSI  ePn     16:39:32.47   0.0    1.3 349 d:2.3+2     4.3  L:2.9-1 .55 2.7X PSI 
                                           g:1.1-1 .90 2.9 
 GSI  ePn     16:39:36.40  -0.2    1.6 266 d:1.8+2     4.3  L:2.1+0 .35 3.7  GSI 
                                           g:2.8-1 .80 3.5 
 BKNI ePn     16:39:47.07   2.6    2.2 120 L:1.5+1 .55 4.9                   BKNI
 IPM  ePn     16:40:03.10  -0.6    3.6  31 L:2.9-1 .65 3.9                   IPM 
 KULM ePn     16:40:10.88  -0.5    4.1  21 L:1.8-1 1.0 3.9                   KULM
 LHMI ePn     16:40:16.03   1.0    4.4 330 L:2.8-1 1.3 4.1  g:8.0-2 1.0 3.2  LHMI
 MYKOMePn     16:40:17.83  -1.5    4.7  85 L:5.0-1 .45 4.5  g:7.0-2 .90 3.3  MYKO
 PBA  ePn     16:41:59.89   0.4   12.0 328                                   PBA 
 CISI ePn     16:42:01.16  -4.1X  12.4 136                                   CISI
 SBUM ePn     16:42:07.26  -7.2X  13.1  85                                   SBUM
 COCO ePn     16:42:21.88  -1.2   13.7 190                                   COCO
 MK01 eP      16:47:42.40  -0.2   47.5 344                                   MK01
 MK31 eP      16:47:42.47  -0.3   47.5 344 b:1.2+0 .85 3.9                   MK31
 MAKZ eP      16:47:43.89   0.3   47.6 344 b:6.4+0 1.7 4.4                   MAKZ
 ZALV eP      16:48:29.07   0.1   53.7 350                                   ZALV
 ABKAReP      16:49:02.16   0.2   58.3 331 b:6.9+0 1.8 4.4                   ABKA



 Generated 2013 MAR 27 at 17:30 UTC

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