Phase Data

Explanation of Parameters


     16 JUL 2010  (197)

     ot  = 09:04:47.44   +/-   0.64              POTOMAC-SHENANDOAH REGION       
     lat =      39.167   +/-    7.7
     lon =     -77.252   +/-    8.3              MAGNITUDE 3.6 (GS)       
     dep =         5.0  (geophysicist)

     15 km (10 miles) NW of Rockville, Maryland (pop 47,000)
     30 km (15 miles) ENE of Leesburg, Virginia (pop 16,000)
     35 km (20 miles) NW of WASHINGTON, D.C. (pop 572,000)
     70 km (45 miles) WNW of ANNAPOLIS, Maryland (pop 35,000)
 
     mbLg 3.6 (GS).

     nph =   15 of  26    se = 1.49    FE=492                            A   

     error ellipse = (131.5,  0.0, 13.3; 41.5,  0.0,  6.8;  0.0,  0.0,  0.0)

 mb = 0.0 (  0)  ML = 0.0 (  0)  mblg = 3.6 ( 10)  md = 0.0 (  0)  MS = 0.0 (  0)

 sta  phase     arrival     res   dist azm    amp  per mag     amp  per mag  sta
 SDMD ePg     09:04:56.30   1.1    0.4  53                                   SDMD
      eSg     09:05:01.96  S res =   1.5X
 CBN  ePg     09:05:06.31   0.4    1.0 186                                   CBN 
      eSg     09:05:20.51  S res =   2.0X
 SSPA ePn     09:05:13.88  -1.8    1.5 342                                   SSPA
      eSn     09:05:32.76  S res =  -3.3X
 JSRW ePn     09:05:14.52  -1.2    1.6 199                                   JSRW
      eSn     09:05:34.62  S res =  -1.5X
 VWCC ePn     09:05:33.17  -0.8    2.9 229                                   VWCC
      eSn     09:06:06.77  S res =  -2.2X
 BLA  ePn     09:05:37.28  -0.7    3.2 233 d:1.7+1     0.1X g:7.6-2 .88 3.1  BLA 
      eSn     09:06:21.77  S res =   5.6X
 TRY  ePn     09:05:56.02   0.1    4.5  36 d:2.1+2     3.2X g:1.5-1 .73 3.7  TRY 
      qSn     09:06:48.35  S res =   0.0X
 ACSO ePn     09:05:57.75   0.9    4.5 285 d:2.5+2     3.4X g:9.9-2 .65 3.6  ACSO
      eSn     09:06:52.83  S res =   2.7X
 QUA2 ePn     09:06:01.76   0.7    4.8  49 d:1.8+2     3.0X g:1.1-1 .73 3.6  QUA2
      eSn     09:07:06.79  S res =   9.2X
 ACCN ePn     09:06:02.39  -0.8    5.0  31 d:2.2+2     3.2X g:1.7-1 .73 3.8  ACCN
      eSn     09:07:07.27  S res =   5.9X  b:2.2+1 .38 5.1X
 NCB  ePn     09:06:03.95  -3.4X   5.3  24 d:2.6+2     3.4X g:1.0-1 .73 3.7  NCB 
                                           b:1.5+1 .35 5.1X
 MDV  ePn     09:06:11.36  -1.5    5.7  31 d:3.4+2     3.8X g:8.5+2 .68 7.7X MDV 
                                           b:1.1+5 .26 9.1X
 LONY ePn     09:06:12.33  -1.8    5.8  19 d:2.1+2     3.2X g:8.5-2 .63 3.7  LONY
                                           b:8.7+0 .53 4.7X
 HNH  ePn     09:06:17.60   2.5    5.9  38 d:2.2+2     3.2X g:1.0-1 .65 3.8  HNH 
                                           b:9.6+0 .43 4.8X
 BLO  ePn     09:06:33.87   0.5    7.2 273 d:3.0+1     0.8X g:1.1-2 .75 2.9  BLO 
                                           b:1.5+1 .45 5.5X
 OLIL ePn     09:06:53.05   2.4    8.5 270 d:3.4+1     0.9X g:1.3-2 .65 3.1  OLIL
                                           b:1.3+1 .38 5.6X



 Generated 2010 JUL 16 at 09:21 UTC

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