Phase Data

Explanation of Parameters


     17 APR 2013  (107)

     ot  = 21:52:23.67   +/-   1.70              SOUTHWESTERN RYUKYU ISL., JAPAN 
     lat =      24.794   +/-    7.7
     lon =     123.075   +/-    7.5              MAGNITUDE 4.3 (GS)       
     dep =        10.0  (geophysicist)

     122 km (76 miles) WNW of Ishigaki-jima, Ryukyu Islands, Japan (pop 45,000)
     125 km (78 miles) E of Su'ao, Taiwan (pop 44,000)
     159 km (99 miles) E of TAIPEI, Taiwan (pop 2,622,000)
     2003 km (1244 miles) WSW of TOKYO, Japan

     nph =   32 of  33    se = 0.84    FE=246                            A   

     error ellipse = (323.0,  1.0, 10.5;233.0,  3.0,  9.4; 76.0, 85.0,  2.8)

 mb = 4.3 ( 18)  ML = 3.4 ( 20)  mblg = 3.2 ( 10)  md = 4.2 (  4)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 YOJ  ePg     21:52:31.39   1.2    0.3 190 d:1.1+2     3.4  L:3.9+1 .95 4.0  YOJ 
 TATO ePn     21:52:49.47  -0.4    1.4 278 d:1.6+2     4.1  L:7.9-1 2.0 3.2  TATO
                                           g:3.2-1 1.0 3.5 
 NACB ePn     21:52:50.71   0.3    1.5 246 d:2.1+2     4.3  L:7.8-1 1.4 3.3  NACB
                                           g:2.1-1 1.1 3.3 
 YHNB ePn     21:52:51.42   0.0    1.5 266 d:2.0+2     4.3  L:1.1+0 1.2 3.5  YHNB
                                           g:1.7-1 .75 3.3 
 YULB ePn     21:52:59.11  -0.4    2.1 230 L:2.8-1 2.0 3.1  g:6.0-2 1.1 3.0  YULB
 SSLB ePn     21:53:00.61   0.6    2.2 243 L:3.0-1 1.7 3.2  g:9.0-2 .85 3.2  SSLB
 TWG  ePn     21:53:06.31  -0.6    2.7 223 L:1.4+0 1.9 4.1                   TWG 
 TPUB ePn     21:53:08.76   1.8    2.7 237 L:3.0-1 1.0 3.4  g:1.3-1 .95 3.4  TPUB
 JOW  ePn     21:53:40.56   0.3    5.1  65 L:7.0-2 2.7 3.5  g:2.0-2 1.2 3.0  JOW 
 SSE  ePn     21:54:02.34   3.0    6.5 346                                   SSE 
 KKM  eP      21:56:50.96  -3.2   19.8 201 b:2.0+1 1.1 4.3                   KKM 
 MDJ  eP      21:56:58.89  -2.6   20.5  13 b:5.2+0 1.1 3.8                   MDJ 
 CHTO eP      21:57:26.85  -3.7   23.2 260 b:9.4+0 1.1 4.2                   CHTO
 GUMO eP      21:57:30.00  -2.7   23.4 114 b:5.7+1 .85 5.2                   GUMO
 CM01 eP      21:57:32.14   0.3   23.3 259                                   CM01
 TNTI eP      21:57:40.14  -0.7   24.2 170 b:1.8+1 1.1 4.6                   TNTI
 SBUM eP      21:57:43.66  -0.2   24.6 207 b:1.2+1 1.1 4.4                   SBUM
 LUWI eP      21:57:52.72  -1.3   25.7 181 b:3.5+1 1.1 5.0                   LUWI
 KSM  eP      21:57:58.00  -1.3   26.3 210 b:9.9+0 .80 4.6                   KSM 
 ULN  eP      21:58:00.42   0.9   26.3 335 b:8.8+0 1.1 4.4                   ULN 
 TLY  eP      21:58:40.60   2.2   30.7 336 b:3.7+0 1.0 4.2                   TLY 
 MK01 eP      21:59:50.80  -0.3   39.1 315                                   MK01
 MK31 eP      21:59:51.37   0.1   39.1 315 b:3.3+0 1.1 3.9                   MK31
 MAKZ eP      21:59:53.24   0.2   39.3 315 b:4.1+0 1.1 4.0                   MAKZ
 ZALV eP      22:00:03.22  -0.9   40.7 326                                   ZALV
 ZAA0 eP      22:00:04.17   0.0   40.7 326 b:4.5+0 1.1 4.1                   ZAA0
 FITZ eP      22:00:20.43  -0.6   42.7 176 b:3.4+0 1.1 4.0                   FITZ
 KURK eP      22:00:20.92  -0.1   42.8 319 b:2.6+0 1.0 3.9                   KURK
 WB2  eP      22:00:45.67  -0.1X  45.8 165                                   WB2 
      eP      22:00:45.90   0.1 
 WRAB eP      22:00:45.94   0.2   45.8 165 b:1.2+1 1.0 4.8                   WRAB
 TIXI eP      22:00:55.00   0.5   47.0   3 b:5.0+0 1.1 4.5                   TIXI
 AS01 eP      22:01:13.09   0.0   49.3 167                                   AS01



 Generated 2013 APR 17 at 23:01 UTC

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