The earthquake measured 1.8 on the Richter scale and the epicenter was 1 mile west southwest of Annandale (38.828°N, 77.234°W), the U.S. Geological Survey says.
The U.S. Geological Survey says the quake struck at 1:30 p.m.
In an advisory to federal agencies, FEMA’s Operations says that the National Earthquake Information Center is reporting the D.C. area experienced rumblings equivalent to a magnitude 2 to 3 earthquake.
The rumblings rattled parts of Northern Virginia – including Vienna, Falls Church, Annandale and Baileys Crossroads – around 1:30 p.m. Tuesday.
There were also reports that this may have been due to blasting at Ft. Belvoir (Metroblogging DC), but it seems that is not the case.
I remember feeling the December 9, 2003 (USGS) magnitude 4.5 quake.