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Preliminary Earthquake Report

Magnitude 3.4 POTOMAC-SHENANDOAH REGION
Friday, July 16, 2010 at 09:04:46 UTC

Magnitude 3.6
Date-Time Friday, July 16, 2010 at 09:04:46 (UTC) - Coordinated Universal Time
Friday, July 16, 2010 at 05:04:46 AM local time at epicenter
Location 39.184N 77.287
Depth 5.0 kilometers
Region POTOMAC-SHENANDOAH REGION
Distances 15 km (10 miles) NW of Rockville, Maryland
30 km (15 miles) ENE of Leesburg, Virginia
35 km (20 miles) NW of WASHINGTON, D.C.
70 km (45 miles) WNW of ANNAPOLIS, Maryland
Location Uncertainty Error estimate: horizontal +/- 13.3 km; depth fixed by location program
Parameters Nst=15, Nph=15, Dmin=44.4 km, Rmss=1.49 sec, Erho=13.3 km, Erzz=0 km, Gp=133.1 degrees
Source USGS NEIC (WDCS-D)
Remarks Mw 3.4 (GS).
Event ID us2010yua6

Earthquake Location

Earthquake Location

Earthquake Location