Phase Data

Explanation of Parameters


      7 APR 2013  ( 97)

     ot  = 17:43:52.52   +/-   1.42              MARIANA ISLANDS REGION          
     lat =      21.250   +/-    8.2
     lon =     143.997   +/-   19.5              MAGNITUDE 4.7 (GS)       
     dep =        92.8   +/-    9.3   

     122 km (76 miles) NW of Farallon de Pajaros, N. Mariana Islands (pop none)
     325 km (202 miles) NNW of Agrihan, Northern Mariana Islands
     693 km (430 miles) NNW of SAIPAN, Northern Mariana Islands
     863 km (536 miles) N of HAGATNA, Guam

     nph =   26 of  31    se = 0.70    FE=215                            A   

     error ellipse = (251.0,  2.0, 31.6;157.0, 63.0, 15.7;342.0, 26.0,  3.6)

 mb = 4.7 ( 22)  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
 SARN ePn     17:45:03.43   0.5    4.8 159                                   SARN
 MJB9 ePn     17:47:32.28  -0.6   16.1 343 b:7.4+1 1.4 4.7                   MJB9
 MAJO ePn     17:47:32.27  -0.6   16.1 343 b:7.2+1 1.4 4.7                   MAJO
 KS01 eP      17:48:34.64   2.3   21.4 323                                   KS01
 ULN  eP      17:51:16.66   0.1   39.8 321 b:6.0+0 1.1 4.4                   ULN 
 WB2  eP      17:51:34.64  -0.3   42.0 194                                   WB2 
      eP      17:51:34.89   0.0 
 AS01 eP      17:52:04.14  -0.3   45.7 193                                   AS01
 AS31 eP      17:52:04.82   0.3   45.7 193 b:1.8+0 .65 4.1                   AS31
 TIXI eP      17:52:45.64   0.0   51.2 354 b:4.3+0 1.1 4.4                   TIXI
 ZALV eP      17:53:13.85  -0.5   55.0 322                                   ZALV
 ZAA0 eP      17:53:14.25  -0.1   55.0 322 b:1.4+1 1.3 4.8                   ZAA0
 MK31 eP      17:53:18.67   0.3   55.6 313 b:5.1+0 1.1 4.4                   MK31
 MK01 eP      17:53:18.90   0.6X  55.5 313                                   MK01
 MAKZ eP      17:53:20.72   0.8   55.8 313 b:1.1+1 1.2 4.8                   MAKZ
 KURK eP      17:53:37.72   0.0   58.3 317 b:1.6+1 .85 5.1                   KURK
 BPAW eP      17:53:51.24   0.6X  60.2  27 b:5.7+0 .88 4.7                   BPAW
 ILB  eP      17:54:01.58  -1.7   62.1  27 b:6.0+0 .90 4.6                   ILB 
 IL1  eP      17:54:01.89  -1.4X  62.1  27                                   IL1 
 TOLK eP      17:54:02.52   1.0X  61.8  22 b:1.1+1 1.4 4.7                   TOLK
 RIDG eP      17:54:08.12  -0.1   62.8  28 b:8.1+0 .88 4.7                   RIDG
 BRVK eP      17:54:13.64   0.4   63.6 320 b:1.5+1 .75 5.0                   BRVK
 EPYK eP      17:54:32.27   0.6   66.4  26 b:9.2+0 1.0 4.7                   EPYK
 INK  eP      17:54:38.27  -1.1   67.7  23 b:6.3+0 1.0 4.5                   INK 
 ARU  eP      17:54:53.61  -0.8   70.1 324 b:1.2+1 1.5 4.6                   ARU 
 ABKAReP      17:54:54.48  -2.1   70.4 316 b:1.2+1 .70 4.9                   ABKA
 YKW3 eP      17:55:30.20  -1.7   76.5  28 b:2.8+1 2.0 4.8                   YKW3
 YKB5 eP      17:55:30.89  -1.2X  76.5  28                                   YKB5
 NV01 eP      17:56:07.32   0.2   82.8  52                                   NV01
 DUG  eP      17:56:23.43   0.1   86.1  48 b:5.2+0 .90 4.6                   DUG 
 RLMT eP      17:56:26.05   1.5   86.3  43 b:6.3+0 .85 4.7                   RLMT



 Generated 2013 APR  7 at 19:08 UTC

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