Phase Data

Explanation of Parameters


      7 APR 2013  ( 97)

     ot  = 18:13:09.72   +/-   1.06              CARLSBERG RIDGE                 
     lat =      -2.189   +/-   22.3
     lon =      68.205   +/-    7.1              MAGNITUDE 4.6 (GS)       
     dep =        10.0  (geophysicist)

     572 km (355 miles) WSW of Hithadhoo, Maldives
     735 km (457 miles) NW of Diego Garcia, Chagos Archipelago
     917 km (570 miles) SW of MALE, Maldives
     1639 km (1018 miles) SW of COLOMBO, Sri Lanka

     nph =   17 of  17    se = 0.52    FE=421                            A   

     error ellipse = (165.0,  0.0, 30.4; 75.0, 16.0,  5.5;258.0, 73.0,  2.5)

 mb = 4.6 (  7)  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
 MSEY ePn     18:16:13.56  -0.3   12.9 259                                   MSEY
 CM31 eP      18:20:13.65  -2.4   36.5  55 b:8.8+0 .95 4.6                   CM31
 CHTO eP      18:20:17.25  -0.3   36.7  54 b:1.7+1 1.1 4.8                   CHTO
 LSZ  eP      18:20:57.18  -0.8   41.5 249 b:1.2+1 .75 4.7                   LSZ 
 BTK  eP      18:21:02.92   0.7   42.1   3 b:1.5+1 .85 4.7                   BTK 
 AAK  eP      18:21:25.44   0.0   45.0   7 b:1.0+1 1.0 4.7                   AAK 
 MK01 eP      18:22:06.42  -0.2   50.3  13                                   MK01
 MK31 eP      18:22:06.75   0.0   50.3  13 b:2.2+0 .85 4.2                   MK31
 ZAA0 eP      18:22:59.06  -0.8   57.6  12 b:4.9+0 .90 4.5                   ZAA0
 ZALV eP      18:22:59.30  -0.6   57.6  12                                   ZALV
 WB2  eP      18:24:02.36  -0.2   66.9 111                                   WB2 
 AS01 eP      18:24:03.94   0.8   67.0 115                                   AS01
 MTPU ePKPdf  18:32:47.20   0.0  144.3   1                                   MTPU
 CCUT ePKPdf  18:32:48.06   0.3  144.8   2                                   CCUT
 PKCU ePKPdf  18:32:48.51   0.4  144.9   1                                   PKCU
 LCMT ePKPbc  18:32:49.81   1.5  145.3   2                                   LCMT
 TX31 ePKPbc  18:33:06.37   0.4  151.9 345                                   TX31



 Generated 2013 APR  7 at 19:02 UTC

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