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Earthquake Activity


Phase Data

Explanation of Parameters


     16 AUG 2003  (228)

     ot  = 05:09:20.96   +/-   0.45              SOUTHEASTERN MISSOURI
     lat =      36.796   +/-    6.2
     lon =     -91.718   +/-    4.0              MAGNITUDE 4.0 (GS)
     dep =         5.0  (geophysicist)

     15 km (10 miles) ENE of West Plains, Missouri (pop 10,000)
     55 km (35 miles) NNW of Hardy, Arkansas (pop 500)
     200 km (125 miles) SSE of JEFFERSON CITY, Missouri
     235 km (145 miles) NW of Memphis, Tennessee

     nph =   32 of  39    se = 1.42    FE=484                            A

     error ellipse = (171.4,  0.0,  8.2; 81.4,  0.0,  5.2;  0.0,  0.0,  0.0)

 mb = 0.0 (  0)  ML = 0.0 (  0)  mblg = 4.0 ( 24)  md = 5.0 (  2)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 CCM  eP      05:09:46.57   0.9    1.3  17 d:5.9+2     5.2  g:2.5-1 .65 3.4  CCM
 GNAR eP      05:09:51.18   1.2    1.6 121 d:3.8+2     4.9                   GNAR
 PVMO eP      05:09:51.37   0.4    1.7 103 d:1.2+1     1.9X                  PVMO
 HALT eP      05:09:57.39   0.0    2.1 114 d:5.4+1     3.4X                  HALT
 GLAT eP      05:09:57.84   1.7    2.0 104 d:3.3+2     5.0X                  GLAT
 UALR eP      05:09:59.44   2.5    2.1 194 d:3.8+2     5.1X g:4.1+0 .95 4.7  UALR
 SIUC eP      05:09:59.69   1.1    2.2  65 d:4.5+2     5.3X g:7.2-1 .65 4.1  SIUC
 MET  eP      05:09:59.89   1.1    2.2 139 d:1.3+2     4.2X                  MET
 SLM  eP      05:10:00.23   1.8    2.2  32 d:1.2+2     4.2X g:2.5+0 .70 4.6  SLM
 UTMT eP      05:10:01.68   1.0    2.3 100 d:2.5+2     4.8X g:5.0+0 .90 4.8  UTMT
 MIAR eP      05:10:08.72   2.8    2.7 214 g:3.7-1 .73 3.8                   MIAR
 OXF  eP      05:10:10.05   0.6    3.0 140 d:5.0+2     5.7X g:6.7-1 .78 4.1  OXF
 WVT  eP      05:10:12.97   0.0    3.2 101 d:5.9+2     5.9X g:2.2-1 .75 3.7  WVT
 PLAL eP      05:10:16.16  -0.5    3.5 120 d:5.8+2     6.0X g:4.4-1 .80 4.0  PLAL
 USIN eP      05:10:16.31   0.1    3.4  69 d:3.3+2     5.5X                  USIN
 WCI  eP      05:10:31.56  -0.4    4.5  70 d:4.6+2     6.2X g:2.3-1 .80 3.8  WCI
 KSU1 eP      05:10:33.34   2.0    4.5 302 d:3.5+2     6.0X                  KSU1
 BLO  eP      05:10:34.42  -0.4    4.7  58 d:3.9+2     6.2X g:4.8-1 .75 4.2  BLO
 LRAL eP      05:10:42.88  -1.2    5.4 133 d:5.0+2     6.6X g:1.9-1 .88 3.8  LRAL
 CPCT eP      05:10:51.69  -0.6    6.0 101                                   CPCT
 WMOK eP      05:10:54.82   0.9    6.1 252 g:1.1-1 .73 3.8                   WMOK
 MYNC eP      05:10:56.69  -1.5    6.4 103 g:2.8-1 .85 4.2                   MYNC
 CBKS eP      05:11:02.18   0.2    6.7 290 d:4.6+1     5.1X g:3.5-1 1.0 4.2  CBKS
 GOGA eP      05:11:13.62  -0.8    7.6 114 d:3.8+2     7.2X g:1.4-1 .70 4.1  GOGA
 ACSO eP      05:11:14.90  -1.0    7.7  61 d:3.3+2     7.2X g:2.0-1 1.0 4.1  ACSO
 PWV  eP      05:11:26.11  -2.3    8.5  83                                   PWV
 JSC  qP      05:11:27.31  -5.6X   8.9 103 d:5.5+0     4.1X                  JSC
 ELN  eP      05:11:28.51  -3.1X   8.8  84 d:3.7+2     7.7X                  ELN
 BLA  qP      05:11:33.61  -1.7    9.0  84                                   BLA
 JCT  eP      05:11:36.24  -1.4    9.2 229 d:4.5+2     8.0X g:1.0-1 1.1 3.9  JCT
 CPRX eP      05:11:55.96  -1.5   10.7 253                                   CPRX
 SDCO eP      05:11:57.83  -4.9X  11.0 279 g:9.9-2 .88 4.1                   SDCO
 ISCO eP      05:12:02.84  -3.9X  11.3 290 g:7.1-2 .80 4.0                   ISCO
 GDL2 eP      05:12:06.10  -1.4   11.4 250                                   GDL2
 ANMO eP      05:12:15.48  -1.7   12.1 266 g:1.7-2 .88 3.4                   ANMO
 LTX  eP      05:12:20.30  -1.8   12.5 237 g:2.2-2 .93 3.5                   LTX
 BINY qP      05:12:26.27  -6.6X  13.3  61 g:5.8-2 1.1 3.9                   BINY
 ULM  eP      05:12:33.64  -5.6X  13.8 349 g:1.6-2 1.0 3.4                   ULM
 MCMT q       05:13:37.31   5.3X  17.9 303                                   MCMT



 Generated 2003 AUG 16 at 06:06 UTC

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First Government graphic