Phase Data

Explanation of Parameters


     23 APR 2013  (113)

     ot  = 14:17:57.18   +/-   0.59              IZU ISLANDS, JAPAN REGION       
     lat =      29.162   +/-    8.2
     lon =     138.551   +/-   13.0              MAGNITUDE 4.1 (GS)       
     dep =       519.1   +/-    9.9   

     427 km (265 miles) WNW of Chichi-shima, Bonin Islands, Japan
     454 km (282 miles) SSW of Hachijo-jima, Izu Islands, Japan
     557 km (346 miles) NNW of Iwo Jima, Volcano Islands, Japan
     732 km (455 miles) S of TOKYO, Japan

     nph =   19 of  22    se = 0.83    FE=211                            B   

     error ellipse = ( 65.4, 27.6, 23.6;234.2, 62.0, 12.1;333.0,  4.7,  9.8)

 mb = 4.1 ( 11)  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
 INU  eP      14:19:38.01   0.9    6.3 349                                   INU 
 MJB9 eP      14:19:47.07  -0.5    7.4 358                                   MJB9
 MAJO eP      14:19:47.11  -0.4    7.4 358                                   MAJO
 JNU  eP      14:19:54.96   4.3X   7.7 303                                   JNU 
 JOW  eP      14:20:03.86  -4.4X   9.4 258                                   JOW 
 ANA2 eP      14:21:01.17   0.6   14.4 151                                   ANA2
 TATO eP      14:21:13.53  -1.5   15.8 259                                   TATO
 GUMO eP      14:21:24.02   0.6   16.6 158 b:1.3+2 1.0 5.5X                  GUMO
 BILL eP      14:24:59.79  -4.2X  42.2  15 b:4.9+0 .80 4.1                   BILL
 TIXI eP      14:25:07.27  -1.6   42.9 356 b:3.0+0 1.0 3.8                   TIXI
 HNR  eP      14:25:14.24  -0.9   43.6 149 b:5.0+1 .45 5.3X                  HNR 
 ZAA0 eP      14:25:32.39   0.4   45.8 318 b:4.7+0 1.0 4.0                   ZAA0
 ZALV eP      14:25:32.86   0.8   45.8 318                                   ZALV
 MK31 eP      14:25:39.33   0.6   46.7 308 b:2.2+0 .90 3.7                   MK31
 MK01 eP      14:25:39.39   0.7   46.7 308                                   MK01
 KURK eP      14:25:58.15   0.4   49.2 313 b:8.9+0 .65 4.4                   KURK
 KDJ  eP      14:26:07.88   0.3   50.5 302 b:1.6+1 1.9 4.1                   KDJ 
 BRVK eP      14:26:35.68   0.7   54.4 316 b:1.2+1 .55 4.4                   BRVK
 KKAR eP      14:26:41.13  -0.1   55.3 304 b:6.0+0 .55 4.1                   KKAR
 KK31 eP      14:26:41.19  -0.1   55.3 304 b:6.0+0 .55 4.1                   KK31
 ARU  eP      14:27:18.23  -0.3   60.8 321 b:8.5+0 .80 4.2                   ARU 
 ABKAReP      14:27:21.61  -0.6   61.4 313 b:5.2+0 .70 4.1                   ABKA



 Generated 2013 APR 23 at 15:59 UTC

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