Phase Data

Explanation of Parameters


      2 MAY 2013  (122)

     ot  = 13:04:35.18   +/-   1.36              EASTERN HONSHU, JAPAN           
     lat =      36.478   +/-    9.7
     lon =     139.145   +/-    6.9              MAGNITUDE 4.5 (GS)       
     dep =        12.6   +/-    5.1   

     13 km (8 miles) NNE of Maebashi, Honshu, Japan (pop 318,000)
     67 km (41 miles) W of Utsunomiya, Honshu, Japan (pop 457,000)
     88 km (55 miles) ESE of Nagano, Honshu, Japan (pop 378,000)
     104 km (64 miles) NNW of TOKYO, Japan (pop 8,489,000)
 
     Felt at Takasaki and Tsukuba. Also felt in Mito and Utsunomiya.

     nph =   27 of  31    se = 0.67    FE=227                            A   

     error ellipse = (188.0,  6.0, 15.1; 97.0, 14.0, 10.7;301.0, 74.0,  7.3)

 mb = 4.5 ( 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
 MJAR ePg     13:04:49.87   0.0    0.8 275                                   MJAR
      eSn     13:05:01.49  S res =  -1.5 
 MJB9 ePn     13:04:51.39  -0.3    0.8 275                                   MJB9
 MAJO ePn     13:04:51.42  -0.3    0.8 275                                   MAJO
      eSn     13:05:02.71  S res =  -0.4 
 INU  ePn     13:05:13.12   3.7    2.0 237                                   INU 
 JHJ2 ePn     13:05:28.16   0.2    3.4 171                                   JHJ2
 ERM  ePn     13:06:09.68   1.3    6.3  28                                   ERM 
 MDJ  ePn     13:07:18.78   7.9   10.9 321                                   MDJ 
 BJT  eP      13:08:53.81   4.1   18.4 288 b:1.0+1 1.1 3.9                   BJT 
 GUMO eP      13:09:44.12   0.5   23.4 166 b:8.4+1 1.0 5.2                   GUMO
 MA2  eP      13:09:52.25   0.0   24.3  14 b:3.7+0 .80 4.1                   MA2 
 ZALV eP      13:12:17.67   0.3   41.0 313                                   ZALV
      ePcP    13:14:15.70  -1.7 
 RC01 eP      13:13:29.48   1.3   49.9  37 b:4.8+1 1.6 5.2                   RC01
 GHO  eP      13:13:31.59   0.8   50.2  36 b:1.0+2 1.9 5.5                   GHO 
 WRH  eP      13:13:34.87   2.7   50.4  32 b:2.0+1 1.9 4.8                   WRH 
 ARU  eP      13:14:09.86  -0.3   55.6 318                                   ARU 
 WRA  eP      13:14:14.22  -1.5   56.3 185 b:2.5+0 .60 4.4                   WRA 
 ABKAReP      13:14:19.02  -0.7   56.9 310                                   ABKA
      eP      13:14:19.15  -0.6 
 ASAR eP      13:14:42.09   0.4   60.0 186                                   ASAR
 AS31 eP      13:14:42.92   1.2   60.0 186 b:1.2+0 .55 4.3                   AS31
 BMO  eP      13:16:08.05  -0.4X  73.6  46 b:1.9+0 .85 4.2                   BMO 
 LRM  eP      13:16:20.55   2.9X  75.2  42                                   LRM 
 KVN  eP      13:16:25.22  -0.2   76.5  51 b:4.4+0 .98 4.5                   KVN 
 BOZ  eP      13:16:26.00   1.7X  76.4  43 b:2.0+0 .80 4.3                   BOZ 
 NVAR eP      13:16:26.52  -0.3   76.8  52                                   NVAR
 BRTR eP      13:16:32.64  -0.1   77.8 311                                   BRTR
 R11A eP      13:16:36.25  -0.4   78.5  51 b:9.3+0 2.0 4.5                   R11A
 WALA eS      13:25:27.79  -4.3X  73.1  41                                   WALA



 Generated 2013 MAY  3 at 05:18 UTC

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