Phase Data

Explanation of Parameters


     17 FEB 2013  ( 48)

     ot  = 10:48:37.82   +/-   2.45              RYUKYU ISLANDS, JAPAN           
     lat =      25.750   +/-   15.1
     lon =     127.513   +/-   13.6              MAGNITUDE 4.3 (GS)       
     dep =        41.4   +/-   12.6   

     53 km (33 miles) SSW of Naha, Okinawa, Japan (pop 312,000)
     366 km (227 miles) ENE of Ishigaki-jima, Ryukyu Islands, Japan
     1606 km (997 miles) SW of TOKYO, Japan

     nph =   19 of  22    se = 1.21    FE=238                            A   

     error ellipse = (143.0, 30.0, 29.7;238.0,  7.0, 16.6;341.0, 58.0, 13.7)

 mb = 4.2 (  8)  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
 JOW  ePn     10:48:59.76   0.5    1.3  32                                   JOW 
 YOJ  ePn     10:49:42.30   1.9    4.3 254                                   YOJ 
 TATO ePn     10:49:57.84   0.6    5.5 263                                   TATO
 NACB ePn     10:49:59.16   0.6    5.6 255                                   NACB
 YHNB ePn     10:50:00.18   0.6    5.7 260                                   YHNB
 YULB ePn     10:50:04.17  -1.7    6.1 249                                   YULB
 JNU  ePn     10:50:32.91   2.5X   7.9  21                                   JNU 
 MAJO ePn     10:51:52.08  -3.1X  14.1  38                                   MAJO
 MJB9 ePn     10:51:52.08  -3.1   14.1  38                                   MJB9
 DAV  eP      10:52:51.71  -0.8   18.7 186 b:1.4+2 .45 5.5                   DAV 
 SARN eP      10:52:58.12  -0.7   19.2 114 b:9.8+1 1.0 5.0                   SARN
 SONA1eP      10:54:21.79   0.3   27.6 329                                   SONA
 MK01 eP      10:56:18.29  -1.5   41.4 313                                   MK01
 MKAR eP      10:56:18.39  -1.5   41.4 313 b:8.2+0 .60 4.6                   MKAR
 MK31 eP      10:56:18.44  -1.5   41.4 313                                   MK31
 MAKZ eP      10:56:20.53  -1.1   41.6 312 b:9.0-1 .50 3.7                   MAKZ
 COEN eP      10:56:31.30   3.5X  42.3 157 b:3.7+0 1.0 4.1                   COEN
 BRVK eP      10:57:29.33  -0.6   50.3 319 b:4.1+0 1.1 4.4                   BRVK
 ABKAReP      10:58:15.64  -0.1   56.5 314                                   ABKA
 RES  eP      11:00:21.90   1.0   76.1  11 b:1.6+0 1.0 3.9                   RES 
 NC405eP      11:00:38.50   0.1   79.2 334                                   NC40
 BUR04eP      11:00:39.27   0.9   79.2 318                                   BUR0



 Generated 2013 FEB 17 at 11:13 UTC

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