Magnitude 5.9
(later downgraded to 5.8 by USGS)

Tuesday, August 23, 2011 at 17:51:03 UTC
Tuesday, August 23, 2011 at 01:51:03 PM at epicenter

Location 37.975°N, 77.969°W
Depth 1 km (~0.6 mile) (poorly constrained)
(later updated to 6 km (3.7 miles)



6 km (4 miles) SSE (152°) from Louisa, VA
6 km (4 miles) SW (236°) from Mineral, VA
26 km (16 miles) SE (133°) from Gordonsville, VA
66 km (41 miles) NW (318°) from Richmond, VA
134 km (83 miles) SW (219°) from Washington, DC


Earthquake depth was VERY SHALLOW, ~1km, meaning lots of shaking…
(update, USGS just changed depth to 3.5 miles still pretty shallow)

Shook much of Washington, D.C., felt as far north as Rhode Island, New York City

Brings down cell phone / landline service to New York (apparently now restored)
All Flights Grounded at New York Airports
Pentagon Evacuated
Office Workers Scramble onto Streets in Washington DC
Rattles Manhattan
US Capitol Building Evacuated
2 Nuke Reactors Taken Offline
Downtown Baltimore: Office Workers Run to Streets
Felt in Toronto Canada
Geologist Warns of Aftershocks
Union Station Evacuated, Chunks of Ceiling Falling…
National Monuments Evacuated and Closed
LaGuardia Airport Evacuated
Verizon and ATT say Very High Volume Making Service Spotty
Nuclear Regulatory Commission: …not immediately aware of any damage
NRC: Officials are still assessing the situation
North Anna Nuclear Power Station, now using four diesel generators to maintain cooling
People “Panicking”
News Agencies telling people to ‘Calm Down’
JFK resumes flights
Could be some structural damaged buildings: being inspected
University of California, R. Allen: “Cannot rule out larger quake to come”
Workers return to Pentagon…
Washington Monument Reportedly LEANING?!
Tremors felt as far north as Bath, Maine
President to speak and calm people’s nerves
Californians chuckle…
USGS: The largest damaging earthquake in that zone since 1875
Wall Street Surges, Rallies while earth shakes
Broken Spire at the National Cathedral, DC
“a thunderous noise”
The largest to ever hit the D.C. area
White House Roof Snipers Scramble From Hiding Holes During Quake


Edgartown, Martha’s Vineyard Courthouse Evacuated During Quake
Obama didn’t feel it while on Golf Course, but apparently ‘double bogeyed’ oops…

and the best news is…
DC Employee Evacuation Results in Temporary Economic Recovery


Washington DC earthquake damage
(sorry, i couldn’t resist…)


Cracks Found at Washington Monument
Quake waves raced west, 500 miles/min, reaching CA seismo monitors in 5 minutes
…even on the East Coast you want to be prepared


Virginia Earthquake Seismic Waves Race Across the Country


Food For Thought,
Could This Be A Foreshock??
(probably not, but it is possible)


You may be interested in
Earthquake History East Coast USA Continental Shelf

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