M 3.6 Quake Strikes Potomac-Shenandoah, Maryland

Germantown Quake Largest Ever Recorded in D.C.

More, Stronger Quakes Could Strike the Atlantic Seaboard

The quake epicentered at 39.167°N, 77.252°W, in Germantown neighborhood, about 20 miles NW of Washington DC, and struck at a depth of about 5km on Friday, July 16, 2010 at 09:04:47 UTC, USGS/EHP reported.

Earthquake Details

• Magnitude 3.6
• Date-Time
  • Friday, July 16, 2010 at 09:04:47 UTC
  • Friday, July 16, 2010 at 05:04:47 AM at epicenter
• Location 39.167°N, 77.252°W
• Depth 5 km (3.1 miles) set by location program
• 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 horizontal +/- 13.3 km (8.3 miles); depth fixed by location program
• Parameters: NST= 15, Nph= 15, Dmin=44.7 km, Rmss=1.49 sec, Gp=133°, M-type=”Nuttli” surface wave magnitude (mbLg), Version=6
• Source: USGS NEIC (WDCS-D)
• Event ID: us2010yua6

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