Phase Data

Explanation of Parameters


     25 FEB 2013  ( 56)

     ot  = 07:32:02.72   +/-   1.34              EASTERN HONSHU, JAPAN           
     lat =      36.951   +/-   12.3
     lon =     139.195   +/-   11.2              MAGNITUDE 4.5 (GS)       
     dep =        10.0   +/-    1.9   

     64 km (40 miles) N of Maebashi, Honshu, Japan (pop 318,000)
     76 km (47 miles) NW of Utsunomiya, Honshu, Japan (pop 457,000)
     96 km (60 miles) ENE of Nagano, Honshu, Japan (pop 378,000)
     149 km (93 miles) NNW of TOKYO, Japan (pop 8,489,000)

     nph =   18 of  18    se = 0.66    FE=227                            A   

     error ellipse = (140.0,  0.0, 22.5;230.0,  0.0, 12.4; 33.0, 89.0,  2.9)

 mb = 4.5 ( 13)  ML = 4.0 (  8)  mblg = 3.2 (  3)  md = 3.6 (  1)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 MAJO ePg     07:32:19.82  -0.1    0.9 243 d:1.2+2     3.6  L:1.8+0 2.4 3.2  MAJO
                                           g:2.2-1 .80 3.2 
 INU  ePn     07:32:42.71   1.0    2.4 228 L:7.0-1 4.9 3.6                   INU 
 JHJ2 ePn     07:33:01.18  -1.0    3.9 172 L:2.4+0 4.8 4.7                   JHJ2
 ERM  ePn     07:33:29.89  -0.4    5.9  30 L:2.5-1 4.8 4.4                   ERM 
 ANM  eP      07:39:59.26   0.7   42.6  32 b:3.7+0 1.1 4.0                   ANM 
 TOLK eP      07:40:52.74   0.8   49.4  27 b:2.6+0 .95 4.2                   TOLK
 MDM  eP      07:40:56.29   0.0   49.9  32 b:6.8+0 1.0 4.6                   MDM 
 DAWY eP      07:41:25.72   0.3   53.8  33 b:1.3+0 1.0 3.9                   DAWY
 EPYK eP      07:41:30.43   0.4   54.5  30 b:9.5+0 .90 4.8                   EPYK
 INK  eP      07:41:35.67   0.0   55.3  27 b:4.7+0 1.0 4.4                   INK 
 HYT  eP      07:41:38.15   1.1   55.4  36 b:3.3+0 .80 4.4                   HYT 
 WRAB eP      07:41:44.97  -1.9   56.8 185 b:9.1+0 1.0 4.8                   WRAB
 ABKAReP      07:41:45.32  -0.4   56.6 310                                   ABKA
 RES  eP      07:42:29.44  -0.5   63.1  14                                   RES 
 BEKR eP      07:43:40.54  -0.1   74.3  52 b:3.7+0 1.0 4.3                   BEKR
 DLMT eP      07:43:48.06  -0.1   75.6  44 b:4.9+0 .95 4.6                   DLMT
 KVN  eP      07:43:51.50   0.0   76.2  51 b:2.9+0 .98 4.3                   KVN 
 H17A eP      07:43:59.92   1.9   77.4  44 b:8.2+0 1.1 4.7                   H17A



 Generated 2013 FEB 25 at 08:03 UTC

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