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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     31 MAR 2009  ( 90)

     ot  = 13:26:17.92   +/-   3.26              LUZON, PHILIPPINES              
     lat =      14.521   +/-    5.7
     lon =     123.657   +/-   10.0              MAGNITUDE 4.8 (GS)       
     dep =        25.2   +/-   24.4   

     80 km (50 miles) NW of Pandan, Catanduanes, Philippines (pop N/A)
     110 km (70 miles) NNE of Naga, Luzon, Philippines (pop 137,000)
     150 km (95 miles) N of Legaspi, Luzon, Philippines (pop 157,000)
     290 km (180 miles) E of MANILA, Philippines

     nph =   27 of  29    se = 0.85    FE=249                            B   

     error ellipse = ( 27.6, 84.7, 37.7;251.0,  3.9, 16.0;160.8,  3.7,  6.7)

 mb = 4.8 ( 20)  ML = 0.0 (  0)  mblg = 3.7 (  6)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 YULB qP      13:28:21.41  -6.3X   9.1 346 d:5.8+1     6.2X L:4.4-2 .80 4.2X YULB
                                           g:2.9-2 .80 3.5  b:2.9+1 .80 5.6X
 SSLB eP      13:28:33.66  -0.5    9.6 345 d:3.8+1     6.0X L:7.0-2 .70 4.5X SSLB
                                           g:4.2-2 .70 3.7  b:4.2+1 .70 5.8X
 YHNB eP      13:28:44.68   0.1   10.3 348 g:5.3-2 .80 3.8  b:4.3+1 .65 5.9X YHNB
 ENH  eP      13:30:54.13   1.0   20.4 323 g:2.0-2 .93 3.8  b:6.0+1 1.4 4.8  ENH 
 IPM  qP      13:31:32.31  -2.1   24.4 248 g:1.3-2 .80 3.8  b:1.3+1 .80 4.5  IPM 
 KULM eP      13:31:34.50  -0.3   24.4 250 g:9.3-3 .90 3.6  b:6.4+0 .60 4.4  KULM
 FITZ eP      13:32:46.15  -0.4   32.5 176 b:5.0+0 .53 4.7                   FITZ
 LSA  eP      13:32:57.82   1.4   33.5 302 b:1.7+1 1.0 4.9                   LSA 
 COEN eP      13:33:01.30  -0.8   34.3 145 b:1.0+2 .93 5.7                   COEN
 MBWA eP      13:33:14.68   0.5   35.7 186 b:1.8+1 .88 5.0                   MBWA
 WRAB eP      13:33:15.67   0.1   35.8 163 b:1.1+1 .40 5.1                   WRAB
 ULN  eP      13:33:17.76   0.8   36.0 341 b:3.9+1 1.1 5.2                   ULN 
 AS31 eP      13:33:44.42  -0.2   39.3 165                                   AS31
 TLY  eP      13:33:54.01   0.1   40.4 341 b:1.0+1 .90 4.6                   TLY 
 CTAO eP      13:34:00.07   1.3   40.9 147 b:2.3+1 1.2 4.8                   CTAO
 MK31 eP      13:34:47.78  -0.3   47.1 322                                   MK31
 BBOO eP      13:34:59.30   0.3   48.5 166 b:2.6+2 .50 6.5X                  BBOO
 STKA eP      13:35:04.97   0.6   49.2 160 b:1.9+0 .68 4.2                   STKA
 ZAA0 eP      13:35:06.98  -0.7   49.7 331                                   ZAA0
 KURK eP      13:35:18.81   0.1   51.1 325 b:1.7+1 .90 5.0                   KURK
 KBL  eP      13:35:32.68   0.5   52.9 302 b:6.9+0 .60 4.8                   KBL 
      e       13:35:43.12   0.1X
 KKAR eP      13:35:36.52   0.3   53.5 313 b:6.5+0 .95 4.6                   KKAR
 BRVK eP      13:36:00.47   0.4   56.8 325 b:8.7+0 .85 4.8                   BRVK
 TIXI eP      13:36:00.77  -1.7   57.2   2 b:1.1+1 1.3 4.7                   TIXI
 BILL eP      13:36:21.85  -0.7   60.1  17 b:9.9+0 1.2 4.8                   BILL
 ABKAReP      13:36:35.95  -0.1   62.0 318 b:4.7+0 .58 4.8                   ABKA
 ARU  eP      13:36:50.54  -0.5   64.3 326 b:3.7+0 .35 4.9                   ARU 
 BUR08eP      13:38:52.07   0.6   85.0 318                                   BUR0



 Generated 2009 MAR 31 at 15:28 UTC

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


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