Phase Data

Explanation of Parameters


     25 FEB 2013  ( 56)

     ot  = 03:52:34.49   +/-   1.72              NEAR EAST COAST OF HONSHU, JAPAN
     lat =      37.663   +/-    9.4
     lon =     141.889   +/-   12.8              MAGNITUDE 4.6 (GS)       
     dep =        22.2   +/-    6.0   

     110 km (68 miles) SE of Sendai, Honshu, Japan (pop 1,024,000)
     112 km (70 miles) NE of Iwaki, Honshu, Japan (pop 354,000)
     126 km (78 miles) E of Fukushima, Honshu, Japan (pop 290,000)
     291 km (181 miles) NE of TOKYO, Japan

     nph =   21 of  21    se = 0.85    FE=228                            A   

     error ellipse = (105.0, 22.0, 21.4;199.0,  8.0, 14.5;308.0, 65.0,  3.8)

 mb = 4.6 (  7)  ML = 3.8 (  8)  mblg = 3.4 (  4)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 MAJO ePn     03:53:24.31   1.6    3.1 250 L:3.5-1 .85 3.6  g:1.1-1 .85 3.4  MAJO
 MJB9 ePn     03:53:24.35   1.6    3.1 250 g:1.1-1 .82 3.4                   MJB9
 ERM  ePn     03:53:39.80  -0.8    4.5  12 L:2.3-1 1.8 3.9                   ERM 
      eSn     03:54:29.96  S res =  -1.8 
 INU  ePn     03:53:42.48   0.6    4.5 241 L:1.3-1 2.0 3.7  g:5.0-2 .85 3.2  INU 
 JHJ2 ePn     03:53:48.51   2.5    4.8 201 L:1.9+0 3.3 4.9                   JHJ2
      eSn     03:54:37.87  S res =  -3.5 
 USA0BePn     03:54:56.52   0.7    9.9 314                                   USA0
 MA2  eP      03:57:33.66  -0.2   22.7  12 b:6.9+0 .70 4.3                   MA2 
 SONA1eP      03:58:21.94   0.4   27.8 303                                   SONA
 MK01 eP      04:00:40.55  -0.4   44.1 302                                   MK01
 MK31 eP      04:00:41.00   0.0   44.1 302                                   MK31
 MKAR eP      04:00:41.00   0.0   44.1 302 b:1.7+1 1.0 4.8                   MKAR
 MAKZ eP      04:00:42.77   0.1   44.3 302 b:1.9+0 .80 4.0                   MAKZ
 KURK eP      04:00:54.38  -0.3   45.8 308 b:5.8+0 .60 4.7                   KURK
 GAR  eP      04:02:02.94   0.3   54.8 295 b:4.8+0 .58 4.7                   GAR 
 CHGR eP      04:02:09.74   0.2   55.7 295 b:1.3+1 1.0 4.9                   CHGR
 WB2  eP      04:02:22.90  -0.7   57.7 188                                   WB2 
 ABKAReP      04:02:23.65  -0.4   57.8 310                                   ABKA
 AS01 eP      04:02:47.54  -1.7   61.5 188                                   AS01
 H17A eP      04:04:18.82   2.4   75.4  45 b:5.1+0 .90 4.6                   H17A



 Generated 2013 FEB 25 at 04:50 UTC

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