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Earthquake Hazards Program
Phase Data

Explanation of Parameters


     11 MAY 2008  (132)

     ot  = 10:17:51.98   +/-   0.20              LA PAZ, BOLIVIA                 
     lat =     -17.631   +/-    4.7
     lon =     -69.265   +/-    5.9              MAGNITUDE 4.4 (GS)       
     dep =       166.7  (depth phases)

     110 km (70 miles) ENE of Tacna, Peru (pop 215,000)
     145 km (90 miles) NE of Arica, Chile (pop 175,000)
     170 km (105 miles) SW of LA PAZ, Bolivia
     1035 km (640 miles) SE of LIMA, Peru

     nph =   77 of 108    se = 0.86    FE=118                            A   

     error ellipse = ( 57.2,  0.0,  8.6;147.2,  0.0,  4.7;  0.0,  0.0,  0.0)

 mb = 4.3 ( 48)  ML = 0.0 (  0)  mblg = 0.0 (  0)  md = 5.1 (  1)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 LPAZ ePn     10:18:26.51   0.7    1.7  39 d:4.3+2     5.1                   LPAZ
      eSn     10:18:48.92  S res =  -2.8X
 LVC  P       10:19:04.49  -1.0    5.0 176                                   LVC 
      S       10:19:58.81  S res =  -4.3X
 SIV  P       10:19:44.52  -1.1    8.0  79                                   SIV 
      S       10:21:12.84  S res =  -2.4X
 NNA  ePn     10:19:57.24  -4.4X   9.2 306                                   NNA 
      eSn     10:21:34.36  S res = -10.0X
 CFAA P       10:21:00.24  -2.3   13.9 176                                   CFAA
 CPUP qPn     10:21:04.32   0.5   14.0 130                                   CPUP
      eP      10:21:10.64   4.2X
 OTAV eP      10:22:10.84  -0.7   19.9 332 b:8.3+0 .80 4.2                   OTAV
 SPB  eP      10:22:25.24  -0.1   21.3 110 b:9.9+0 .54 4.5                   SPB 
 TRQA eP      10:22:25.87   0.0   21.3 164 g:5.9-3 1.0 3.3X b:3.7+0 .80 3.9  TRQA
      e       10:23:16.14   0.1X
 PLCA eP      10:22:43.07   0.4   23.0 182 b:1.1+1 .90 4.3                   PLCA
 JTS  P       10:24:00.74  -0.1   31.8 330                                   JTS 
 SWET eP      10:27:04.07  -1.2   54.9 343                                   SWET
 WVT  eP      10:27:13.51  -1.6   56.3 342 b:6.0+0 .68 4.6                   WVT 
 JCT  eP      10:27:13.82  -0.5   56.1 328 b:1.0+1 .79 4.7                   JCT 
      epP     10:27:51.77  depth = 164.1 
 MIAR eP      10:27:17.73  -1.2   56.8 336 b:7.2+0 .58 4.7                   MIAR
 TXAR P       10:27:21.77  -0.8   57.3 324                                   TXAR
      pP      10:28:01.25  depth = 170.7 
 SIUC eP      10:27:27.36  -1.0   58.2 341 b:1.3+1 .60 5.0                   SIUC
      epP     10:28:05.97  depth = 165.7 
 FVM  eP      10:27:31.55  -1.1   58.8 341 b:4.0+1 .70 5.4X                  FVM 
 WMOK eP      10:27:34.02  -1.3   59.2 332 b:3.8+0 .83 4.3                   WMOK
 GDL2 eP      10:27:40.50   0.1   59.9 326                                   GDL2
 KSU1 eP      10:27:53.08  -1.1   62.0 336 b:1.1+1 .61 4.9                   KSU1
 BNM  eP      10:27:58.56  -0.2   62.6 325 b:1.0+0 .58 3.9                   BNM 
 LPM  eP      10:27:59.77   0.2   62.7 326                                   LPM 
 JFWS eP      10:28:01.35  -1.4   63.3 343 b:5.6+0 .65 4.6                   JFWS
 ANMO eP      10:28:01.73  -0.4   63.1 326 b:5.5+0 1.3 4.3                   ANMO
 LAZ  eP      10:28:01.82   0.0   63.1 325 b:1.5+0 1.0 3.8                   LAZ 
 TUC  eP      10:28:05.19  -0.1   63.6 321 b:7.0-1 .60 3.7                   TUC 
 SDCO eP      10:28:13.16   0.1   64.8 329 b:6.5+0 .90 4.5                   SDCO
      epP     10:28:53.01  depth = 168.0 
 ECSD eP      10:28:19.43  -1.1   66.0 339 b:2.0+1 1.5 4.8                   ECSD
 MVCO eP      10:28:20.29   0.2   65.9 326 b:8.9+0 1.0 4.6                   MVCO
 WUAZ eP      10:28:23.22   0.9   66.2 323 b:6.7+0 .95 4.5                   WUAZ
 ISCO eP      10:28:23.79   0.1   66.4 330 b:2.3+0 .90 4.0                   ISCO
 SMCO eP      10:28:25.64   0.7   66.6 329 b:4.8+0 .70 4.4                   SMCO
      epP     10:29:05.04  depth = 165.0 
 BAR  eP      10:28:30.63   0.3   67.5 318 b:5.9+0 .91 4.4                   BAR 
 PFO  eP      10:28:33.84   0.5   68.0 319 b:7.2+0 1.1 4.4                   PFO 
 DBIC eP      10:28:34.31   0.5   68.0  75 b:5.2+1 .75 5.4X                  DBIC
 SRU  eP      10:28:35.73   0.0   68.4 327 b:3.9+0 .78 4.3                   SRU 
 CCUT eP      10:28:39.34   0.9   68.8 324 b:7.9+0 1.0 4.4                   CCUT
      epP     10:29:20.78  depth = 173.3 
 MSU  eP      10:28:39.63   1.0   68.8 325                                   MSU 
      epP     10:29:18.26  depth = 160.5 
 RSSD eP      10:28:41.10   0.4   69.2 334 b:2.1+0 .61 4.1                   RSSD
      epP     10:29:20.94  depth = 165.8 
 SHPR eP      10:28:41.25   0.9   69.1 322                                   SHPR
 GSC  eP      10:28:42.28   0.8   69.3 320 b:8.5+0 1.3 4.4                   GSC 
 JLU  eP      10:28:46.32   0.8   69.9 327 b:7.9+0 1.2 4.4                   JLU 
 DUG  eP      10:28:48.30   0.4   70.4 326 b:6.8+0 1.2 4.3                   DUG 
 PDAR P       10:28:48.59  -0.9   70.6 330                                   PDAR
      pP      10:29:30.16  depth = 173.0 
 ISA  eP      10:28:49.93   0.8   70.6 319 b:3.5+0 .63 4.3                   ISA 
      epP     10:29:29.32  depth = 163.1 
 HWUT eP      10:28:49.94  -0.3   70.7 328 b:2.0+0 .75 4.0                   HWUT
 ULM  eP      10:28:53.22  -1.4   71.5 342 b:9.7+0 .52 4.8                   ULM 
      epP     10:29:33.14  depth = 165.0 
 TPAW eP      10:28:56.45  -0.3   71.8 329 b:5.8+0 1.2 4.2                   TPAW
 IMW  eP      10:28:58.45  -0.1   72.1 330 b:2.8+0 .78 4.0                   IMW 
 BOZ  eP      10:28:59.41  -8.5X  73.8 331 b:1.8+0 .65 3.9                   BOZ 
      epP     10:29:42.44  depth = 178.0X
 NVAR P       10:28:59.83   0.4   72.3 321                                   NVAR
      pP      10:29:40.02  depth = 165.8 
 LKWY eP      10:29:01.45   1.5   72.4 330 b:4.8+0 1.0 4.2                   LKWY
      epP     10:29:40.84  depth = 162.1 
 QSPA eP      10:29:01.60   1.0   72.5 180 b:4.7+0 1.0 4.2                   QSPA
 HLID eP      10:29:07.96   0.8   73.6 328 b:3.4+0 .84 4.1                   HLID
 MCMT eP      10:29:08.66   0.7   73.7 329 b:2.2+0 .96 3.9                   MCMT
 PAHR eP      10:29:09.43   1.5   73.7 322 b:1.7+1 1.0 4.7                   PAHR
 DLMT eP      10:29:09.61   0.2   74.0 330 b:1.8+0 .68 3.9                   DLMT
 EGMT eP      10:29:13.26   0.0   74.7 333 b:5.5+0 1.0 4.2                   EGMT
 MOD  eP      10:29:19.45   0.3   75.7 323 b:7.6+0 1.1 4.3                   MOD 
      epP     10:30:00.72  depth = 169.0 
 SLMT eP      10:29:20.07   0.4   75.8 331 b:1.8+0 .92 3.8                   SLMT
 BMO  eP      10:29:20.89   0.1   76.0 327 b:1.6+1 1.5 4.5                   BMO 
 TOA0 eP      10:29:23.44  -0.5   76.4  71                                   TOA0
      epP     10:30:03.96  depth = 165.2 
 TORD P       10:29:23.85  -0.1   76.4  71                                   TORD
      pP      10:30:04.55  depth = 166.0 
 FCC  eP      10:29:35.79  -0.1   78.8 347 b:6.1-2 .61 2.5X                  FCC 
 EDM  eP      10:29:42.56  -0.7   80.1 335                                   EDM 
      epP     10:30:24.40  depth = 169.7 
 TSUM eP      10:29:52.70   1.3   81.5 107 b:6.0+0 .74 4.4                   TSUM
 ESDC P       10:30:01.38   1.0   83.3  45                                   ESDC
 TAM  eP      10:30:02.48   1.3   83.4  64 b:8.8+0 1.2 4.4                   TAM 
 YKA  P       10:30:20.15   0.1   87.4 341                                   YKA 
      pP      10:31:02.64  depth = 169.5 
 MAW  eP      10:30:24.24   0.9   88.1 163 b:9.0-1 .66 3.9                   MAW 
 DLBC eP      10:30:35.61   0.4   90.6 333                                   DLBC
 STKA PKP     10:36:28.25   0.0  122.6 211                                   STKA
 PETK PKP     10:36:41.03   0.8  129.2 325                                   PETK
 ASAR PKP     10:36:48.75   0.1  133.1 210                                   ASAR
      SKPbc   10:40:02.00   0.8X
 WRA  PKP     10:36:53.78  -0.4  136.1 213                                   WRA 
      SKPbc   10:40:11.61   1.0X
 MKAR PKP     10:37:02.68  -2.6  142.6  33                                   MKAR
      SKPbc   10:40:29.83   2.1X
 MJAR PKPbc   10:37:22.01   0.6  149.3 313                                   MJAR
 SONM PKPbc   10:37:22.90   0.8  149.7   6                                   SONM
      pPKPbc  10:38:05.07  -0.6X



 Generated 2008 MAY 25 at 07:46 UTC

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


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