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Earthquake Hazards Program
Phase Data

Explanation of Parameters


      8 MAY 2008  (129)

     ot  = 01:23:46.57   +/-   0.19              TONGA REGION                    
     lat =     -18.617   +/-    6.6
     lon =    -172.954   +/-    6.2              MAGNITUDE 4.9 (GS)       
     dep =        35.0  (geophysicist)

     110 km (65 miles) E of Neiafu, Tonga (pop 3,000)
     305 km (190 miles) SSE of Hihifo, Tonga
     370 km (230 miles) NE of NUKU'ALOFA, Tonga
     2355 km (1460 miles) NE of Auckland, New Zealand

     nph =  120 of 148    se = 0.92    FE=174                            A   

     error ellipse = (137.2,  0.0, 10.8; 47.2,  0.0,  4.8;  0.0,  0.0,  0.0)

 mb = 4.9 ( 55)  ML = 5.3 (  1)  mblg = 4.5 (  5)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 AFI  ePn     01:24:53.08  -3.6    4.8  14 d:4.8+2     6.4X L:2.9+0 .55 5.3  AFI 
      eSn     01:25:45.14  S res =  -6.2X  g:1.6+0 .75 4.8 
 RAO  ePn     01:26:26.70  -1.8   11.5 202                                   RAO 
 RAR  ePn     01:26:34.64  -9.6X  12.7 104                                   RAR 
      eS      01:28:38.34  S res = -25.7X
 OUZ  eP      01:28:19.88  -0.5   20.4 213 g:1.3-1 1.1 4.5  b:1.3+2 1.1 5.2  OUZ 
 URZ  eP      01:28:32.53   1.2   21.4 202 g:7.1-2 .98 4.4  b:4.5+1 .50 5.1  URZ 
      eS      01:32:19.49  S res =  -7.4X
 SNZO eP      01:29:08.35   1.6   25.0 202                                   SNZO
 KHZ  eP      01:29:24.62   5.3X  26.4 203 g:3.6-2 .84 4.3  b:2.9+1 .66 5.0  KHZ 
 RPZ  eP      01:29:44.68   6.8X  28.4 205 g:3.9-2 .62 4.5  b:4.5+1 .52 5.4  RPZ 
 EIDS eP      01:30:26.21  -0.5   33.9 252 b:2.7+0 .51 4.4                   EIDS
 CTAO eP      01:31:05.02  -0.3   38.4 261 b:2.7+1 .50 5.3                   CTAO
      epP     01:31:18.04  depth =  49.0X
 STKA eP      01:31:41.74  -0.1   42.9 243 b:1.6+0 .90 3.8X                  STKA
 WRA  P       01:32:33.66  -1.2   49.6 259                                   WRA 
      LR      01:52:38.91                                  
 WB2  eP      01:32:34.05  -0.7   49.6 259                                   WB2 
 WRAB eP      01:32:34.21  -0.5   49.6 259 b:1.9+1 .90 5.1                   WRAB
 ASAR P       01:32:34.40  -0.4   49.6 254                                   ASAR
 KAKA eP      01:32:57.30  -1.4   52.8 268 b:5.7+1 .58 5.7                   KAKA
 SBA  eP      01:33:43.90  -5.9X  60.1 185 b:1.6+1 1.1 5.1                   SBA 
 MBWA eP      01:34:10.08   0.2   62.9 255 b:1.9+1 1.2 5.1                   MBWA
 MJAR P       01:35:06.70   1.8   71.7 320                                   MJAR
      LR      02:00:44.09                                  
 ISA  eP      01:35:21.78  -0.9   74.7  43 b:1.3+1 1.1 4.8                   ISA 
 PFO  eP      01:35:23.65   0.0   74.8  46 b:2.2+1 1.4 4.9                   PFO 
 CMB  eP      01:35:24.21   0.2   74.9  41 b:5.3+0 1.1 4.4                   CMB 
 WDC  eP      01:35:26.78   0.9   75.2  37                                   WDC 
 MTUM eP      01:35:28.76   0.4   75.6  42                                   MTUM
      epP     01:35:36.92  depth =  26.1X
 PETK P       01:35:29.30   0.5   75.8 342                                   PETK
      LR      02:06:10.59                                  
 WAKR eP      01:35:29.74   0.5   75.8  41                                   WAKR
 NVAR P       01:35:33.05   0.1   76.4  41                                   NVAR
 PAHR eP      01:35:33.54   0.0   76.6  40 b:8.5+0 .98 4.7                   PAHR
      epP     01:35:42.55  depth =  28.8X
 SHPR eP      01:35:38.53   0.5   77.3  44                                   SHPR
 MOD  eP      01:35:38.66   0.5   77.4  37                                   MOD 
 TUC  eP      01:35:42.39   0.1   78.1  50 b:9.0+0 1.1 4.7                   TUC 
 WVOR eP      01:35:44.88  -0.5   78.7  38 b:2.9+1 1.6 5.0                   WVOR
 CCUT eP      01:35:48.21   0.3   79.1  44 b:9.5+0 1.1 4.7                   CCUT
 ELK  eP      01:35:51.37   0.2   79.7  41 b:2.2+1 1.7 4.9                   ELK 
 N13A eP      01:35:54.74  -0.1   80.4  41 b:3.2+1 1.5 5.1                   N13A
 MSU  eP      01:35:55.40   0.4   80.4  44                                   MSU 
 HAWA eP      01:35:56.47   0.6   80.7  34                                   HAWA
 M13A eP      01:35:56.64   0.1   80.7  41 b:1.5+1 1.6 4.7                   M13A
 DUG  eP      01:35:57.05  -0.5   80.9  42 b:1.1+1 1.4 4.6                   DUG 
 ETW  eP      01:35:57.85  -0.1   81.0  33 b:9.8+0 1.2 4.6                   ETW 
 BMO  eP      01:35:57.92   0.5   80.9  36                                   BMO 
 BGU  eP      01:35:58.85  -0.1   81.2  42 b:7.4+0 1.5 4.5                   BGU 
 MNTX eP      01:36:01.95  -0.3   81.8  53 b:1.0+1 1.0 4.8                   MNTX
 HVU  eP      01:36:02.17  -0.2   81.8  41                                   HVU 
 HLID eP      01:36:02.17  -0.2   81.8  39 b:8.7+0 1.1 4.7                   HLID
 SRU  eP      01:36:02.51   0.1   81.8  44 b:2.4+1 1.6 5.0                   SRU 
 LAZ  eP      01:36:03.15   0.8   81.8  50 b:2.2+0 1.2 4.0                   LAZ 
 TXAR P       01:36:03.45  -0.3   82.1  56                                   TXAR
      LR      02:03:52.69                                  
 DAU  eP      01:36:04.19   0.5   82.0  43                                   DAU 
 LPM  eP      01:36:04.85   0.8   82.1  50                                   LPM 
      epP     01:36:13.38  depth =  27.0X
 HWUT eP      01:36:05.05  -0.8   82.5  42 b:9.8+0 1.4 4.7                   HWUT
 BMRM eP      01:36:05.48   0.1   82.5  14 b:6.2+1 1.7 5.4                   BMRM
 DIV  eP      01:36:05.68   0.9   82.4  13                                   DIV 
 ANMO eP      01:36:06.85   0.6   82.5  49 b:8.5+0 1.2 4.7                   ANMO
 TRF  eP      01:36:10.83  -0.7   83.7  10 b:1.2+1 .92 5.0                   TRF 
 MCMT eP      01:36:11.38   0.4   83.5  38 b:6.6+0 1.1 4.7                   MCMT
 RRI2 eP      01:36:11.88   0.3   83.6  40 b:1.6+1 1.2 5.0                   RRI2
 SKAG eP      01:36:12.25   1.2   83.6  18 b:2.4+1 1.3 5.2                   SKAG
 CHUM eP      01:36:12.27   0.6   83.8   9 b:4.0+0 .78 4.6                   CHUM
 REDW eP      01:36:12.63  -0.4   83.9  40 b:1.3+1 1.2 4.9                   REDW
 BSMT eP      01:36:12.74  -1.4   84.1  35 b:5.6+0 1.3 4.5                   BSMT
 TPAW eP      01:36:12.79  -0.4   83.9  40 b:1.6+1 1.3 5.0                   TPAW
 DLMT eP      01:36:13.21   0.0   83.9  38 b:7.5+0 .95 4.8                   DLMT
 SNOW eP      01:36:13.21  -0.4   84.0  40 b:7.8+0 .84 4.9                   SNOW
 MCK  eP      01:36:13.30  -0.5   84.2  10 b:2.6+1 1.2 5.3                   MCK 
 IMW  eP      01:36:13.80  -0.5   84.1  40 b:5.5+0 .86 4.7                   IMW 
 LOHW eP      01:36:14.03  -0.5   84.2  40 b:5.1+0 .96 4.6                   LOHW
 PDAR P       01:36:14.50  -1.1   84.4  41                                   PDAR
      LR      02:08:27.77                                  
 BW06 eP      01:36:14.52  -1.0   84.4  41                                   BW06
 HYT  eP      01:36:14.56   0.7   84.2  17                                   HYT 
 CHMT eP      01:36:14.92  -0.8   84.4  36                                   CHMT
 SMCO eP      01:36:14.96  -0.2   84.2  46 b:1.7+1 1.3 5.0                   SMCO
 LRM  eP      01:36:15.55   0.5   84.3  38                                   LRM 
 QLMT eP      01:36:15.89   0.6   84.3  39 b:9.2+0 1.1 4.8                   QLMT
 SDCO eP      01:36:16.34  -0.3   84.6  47 b:1.4+1 1.5 4.9                   SDCO
 BOZ  eP      01:36:16.38  -0.4   84.7  38 b:5.6+0 .99 4.7                   BOZ 
 DLBC eP      01:36:17.07   1.3   84.5  21                                   DLBC
 HRY  eP      01:36:18.52  -0.6   85.1  37                                   HRY 
 COLA eP      01:36:19.75  -0.2   85.4  10 b:2.1+1 .90 5.4                   COLA
 WALA eP      01:36:20.30   0.4   85.3  34                                   WALA
 JCT  eP      01:36:20.78  -0.9   85.6  56 b:2.5+1 1.8 5.1                   JCT 
 RWWY eP      01:36:20.89   0.5   85.3  43                                   RWWY
 AMTX eP      01:36:23.19  -0.5   86.0  51 b:1.9+1 1.0 5.3                   AMTX
 DAWY eP      01:36:25.34   0.3   86.4  14                                   DAWY
 EGAK eP      01:36:26.17   0.2   86.6  13 b:1.4+1 1.1 5.1                   EGAK
 PLCA P       01:36:29.92   1.0   87.0 132                                   PLCA
      LR      02:08:41.90                                  
 BILL eP      01:36:31.57   0.3   87.7 352 b:1.3+1 1.0 5.1                   BILL
 EDM  eP      01:36:32.42  -0.5   88.0  31                                   EDM 
 WMOK eP      01:36:33.44  -0.4   88.1  52 b:6.3+0 1.1 4.8                   WMOK
 INK  eP      01:36:47.71  -0.1   91.3  14 b:1.8+1 1.4 5.3                   INK 
 YKA  P       01:36:54.85  -0.4   92.9  23                                   YKA 
      LR      02:09:35.68                                  
 ECSD eP      01:36:57.04  -0.4   93.2  45 b:1.4+1 1.1 5.3                   ECSD
 CMAR P       01:37:03.45   1.8   94.0 288                                   CMAR
 FVM  eP      01:37:08.56   0.2   95.6  52                                   FVM 
 KURK PKP     01:42:24.10  -1.2  115.8 318                                   KURK
 UCH  ePKPdf  01:42:32.10   0.1  118.8 308                                   UCH 
 BVAR PKP     01:42:34.31  -0.2  120.7 321                                   BVAR
 ARU  ePKPdf  01:42:46.06   0.9  126.3 327                                   ARU 
 ARCESPKP     01:42:48.45   0.6  127.8 352                                   ARCE
 AKTK PKP     01:42:49.80  -0.3  128.7 320                                   AKTK
 FINESPKP     01:43:01.60  -0.3  135.2 347                                   FINE
 EKA  PKP     01:43:13.30  -2.2  142.5  10                                   EKA 
 AKASGPKP     01:43:14.38  -2.9  143.4 336                                   AKAS
 KMBO ePKPdf  01:43:19.61  -0.8  144.4 240                                   KMBO
 KWP  ePKPbc  01:43:25.21   0.9  146.6 341                                   KWP 
 MALT ePKPbc  01:43:25.60   1.4  146.4 312                                   MALT
 GERESPKP     01:43:26.96  -0.6  149.4 351                                   GERE
      PKPbc   01:43:32.64   0.7X
 BUR08ePKPbc  01:43:27.47   0.4  147.5 337                                   BUR0
 MORC ePKPbc  01:43:28.95   1.2  147.8 347                                   MORC
 GRF  ePKP    01:43:30.80   4.3X 148.8 355                                   GRF 
 VRAC PKPbc   01:43:30.80   1.4  148.4 348                                   VRAC
 BRTR PKPbc   01:43:31.00   0.0  148.9 318                                   BRTR
 BR131ePKPbc  01:43:31.61   0.6  148.9 318                                   BR13
 MLR  PKPbc   01:43:31.69   0.7  148.9 334                                   MLR 
 GEC2 ePKPbc  01:43:31.78  -0.1  149.4 351                                   GEC2
 PSZ  ePKPbc  01:43:31.79   0.9  149.0 343                                   PSZ 
 WLF  ePKPbc  01:43:32.06   1.2  149.0   1                                   WLF 
 KHC  ePKPbc  01:43:32.24   1.1  149.1 352                                   KHC 
 ASF  PKPbc   01:43:34.96   1.1  150.0 303                                   ASF 
 BNI  ePKPdf  01:43:34.99   0.8  153.6   1                                   BNI 
 BFO  ePKPbc  01:43:35.14   0.9  150.3 358                                   BFO 
 BOJS ePKPdf  01:43:38.79   6.7X 152.3 348                                   BOJS
      iPKPbc  01:43:48.81  10.0X
      e       01:44:03.21   3.2X
 DAVOXPKPbc   01:43:38.89   1.0  151.8 356                                   DAVO
 VISS ePKPdf  01:43:39.22   7.5X 152.1 348                                   VISS
      i       01:43:49.35   1.4X
 EIL  PKPbc   01:43:40.15   0.8  152.3 299                                   EIL 
 JAVS iPKPdf  01:43:41.03   9.1X 152.2 349                                   JAVS
      i       01:43:49.49   1.2X
 TORD PKP     01:43:50.40  -2.7  172.5 136                                   TORD
      PKPab   01:45:17.20  -0.8X
 TOA0 ePKPdf  01:43:51.36  -1.8  172.5 136                                   TOA0



 Generated 2008 MAY 28 at 03:01 UTC

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


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