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Earthquake Hazards Program
Phase Data

Explanation of Parameters


      6 JUL 2007  (187)

     ot  = 06:20:38.60   +/-   1.01              TONGA                           
     lat =     -18.071   +/-    6.4
     lon =    -174.597   +/-    5.8                                       
     dep =        60.3   +/-   10.7   

     90 km (55 miles) NW of Neiafu, Tonga (pop 3,000)
     250 km (155 miles) SSW of Hihifo, Tonga
     345 km (215 miles) N of NUKU'ALOFA, Tonga
     2325 km (1450 miles) NNE of Auckland, New Zealand

     nph =   21 of  22    se = 0.46    FE=173                            A   

     error ellipse = ( 66.2, 70.8, 17.3;334.5,  0.6, 10.1;244.2, 19.1,  7.0)

 mb = 4.8 (  5)  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
 AFI  P       06:21:50.72   0.2    4.9  34                                   AFI 
 RAR  P       06:23:57.70  -0.4   14.3 105                                   RAR 
      LR      06:27:50.69                                  
 URZ  P       06:25:21.43   0.3   21.4 198                                   URZ 
 RPZ  P       06:26:26.64   0.3   28.3 202                                   RPZ 
 CTA  eP      06:27:43.00   0.4   37.0 260 b:9.9+0 1.0 4.7                   CTA 
 STKA P       06:28:22.35   0.3   41.7 242                                   STKA
 WB2  eP      06:29:12.50  -0.7   48.2 259                                   WB2 
 WRA  P       06:29:12.91  -0.3   48.2 259                                   WRA 
 WRAB eP      06:29:12.95  -0.2   48.2 259 b:5.7+0 .65 4.7                   WRAB
 ASAR P       06:29:13.30  -0.5   48.2 254                                   ASAR
 KAKA eP      06:29:36.00  -0.7   51.2 268 b:6.6+0 .40 5.0                   KAKA
 FITZ iPd     06:30:15.80   0.3   56.6 260 b:5.5+0 .50 4.9                   FITZ
 VNDA P       06:30:43.38   0.7   60.6 186                                   VNDA
 MJAR P       06:31:45.61   0.1   70.3 321                                   MJAR
 QSPA eP      06:31:55.69  -0.1   72.0 180 b:6.4+0 .78 4.6                   QSPA
 KSM  eP      06:32:22.48   0.8   76.3 276                                   KSM 
 NVAR P       06:32:25.52  -0.2   77.1  42                                   NVAR
 TXAR P       06:32:58.25   0.3   83.0  56                                   TXAR
 MAW  P       06:33:06.19  -0.5   84.9 199                                   MAW 
 PLCA P       06:33:24.90  -0.3   88.6 132                                   PLCA
 MALT eP      06:40:09.63   0.4  144.9 312                                   MALT



 Generated 2007 JUL 29 at 23:56 UTC

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

 


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