Phase Data

Explanation of Parameters


     22 APR 2013  (112)

     ot  = 15:46:39.53   +/-   0.32              EASTERN SEA OF JAPAN            
     lat =      42.460   +/-    4.1
     lon =     138.396   +/-    4.7              MAGNITUDE 4.0 (GS)       
     dep =       247.8   +/-    5.0   

     208 km (129 miles) WNW of Hakodate, Hokkaido, Japan
     251 km (156 miles) WSW of Sapporo, Hokkaido, Japan
     264 km (164 miles) W of Tomakomai, Hokkaido, Japan
     761 km (473 miles) N of TOKYO, Japan

     nph =   25 of  26    se = 0.37    FE=223                            A   

     error ellipse = (129.3, 45.6,  9.7;234.0, 14.0,  6.1;336.5, 41.0,  4.6)

 mb = 4.0 ( 13)  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
 ERM  ePn     15:47:37.95  -0.1    3.6  96 L:1.6-1 .82 3.6X                  ERM 
 USA0BePn     15:47:55.41   0.4    5.0 293                                   USA0
 YSS  ePn     15:48:01.22   0.4    5.5  33                                   YSS 
 MAJO ePn     15:48:06.31  -0.3    5.9 181                                   MAJO
 MJB9 ePn     15:48:06.44  -0.1    5.9 182                                   MJB9
 MDJ  ePn     15:48:16.37  -0.6    6.8 292                                   MDJ 
 INU  ePn     15:48:22.54   0.0    7.2 189                                   INU 
 JHJ2 ePn     15:48:46.73  -3.8X   9.4 173                                   JHJ2
 KS01 ePn     15:48:51.25  -0.2    9.5 242                                   KS01
 KS15 ePn     15:48:51.82   0.1    9.5 242                                   KS15
 JNU  ePn     15:49:11.84   0.4   11.1 215                                   JNU 
 MA2  eP      15:50:39.99  -0.2   18.8  20 b:2.0+1 1.4 4.4                   MA2 
 ZALV eP      15:53:22.10  -0.2   36.7 307                                   ZALV
 ZAA0 eP      15:53:22.28   0.0   36.7 307 b:5.4+0 .60 4.3                   ZAA0
 MK01 eP      15:53:45.49  -0.2   39.4 296                                   MK01
 MK31 eP      15:53:45.56  -0.1   39.4 296 b:3.5+0 .65 4.0                   MK31
 KURK eP      15:53:57.01  -0.3   40.9 303 b:9.3+0 .80 4.3                   KURK
 TARG eP      15:54:24.32   0.4   44.1 290 b:4.3+0 .80 3.8                   TARG
 KDJ  eP      15:54:25.61  -0.2   44.4 291 b:3.7+0 1.0 3.7                   KDJ 
 AAK  eP      15:54:38.71   0.0   46.0 293 b:2.3+0 .60 3.7                   AAK 
 ARSB eP      15:54:51.42   0.7   47.6 292 b:1.2+1 .75 4.3                   ARSB
 KK31 eP      15:54:57.50  -0.3   48.5 295 b:2.7+0 .80 3.7                   KK31
 KKAR eP      15:54:57.67  -0.1   48.5 295 b:2.7+0 .80 3.7                   KKAR
 GAR  eP      15:55:11.92  -0.3   50.4 290 b:1.5+1 1.4 4.2                   GAR 
 NIL  eP      15:55:16.50   0.8   50.9 283 b:1.0+1 1.0 4.2                   NIL 
 ABKAReP      15:55:28.83  -0.1   52.8 306 b:3.2+0 .60 3.9                   ABKA



 Generated 2013 APR 23 at 15:37 UTC

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