This thread will be constantly updated.

LISS/ANSS back up:

Data from station BLA [Blacksburg, Virginia, USA] (click to enlarge)

The Director of the U.S. Geological Survey, Marcia McNutt said: “What the concern is, of course, is that this is a foreshock. If it’s a foreshock, then the worst is yet to come.”

Terminal A at Washington Reagan National Airport has been evacuated because of an odor of gas.

VIDEO HERE: http://abcnews.go.com/US/video/dc-earthquake-caught-on-tape-14364688

Fox News anchor Megyn Kelly reported at 2:30 pm that their bureau received information from a producer saying that a Capitol Hill Police officer says that the Washington Monument may actually be tilting as a result of the earthquake.

MSNBC reports that two reactors tripped and shut down at the North Anna Nuclear Power Plant in Lake Anna, Virginia, according to the Nuclear Regulatory Commission.

*UPGRADED from 5.8 to 6.0

We’ve got a few replies to this, thanks to those who have sent messages.

“wow that VA quake was felt all way up here in NYC! my 28th floor office just shook
for a minute. everyone is freaked out!”

“It was near DC-felt it here in VA Beach-whole building was rocking….”

“I am a few blocks from the Capitol and everyone has been evacuated and sirens are non stop so we don’t know if anyone has been hurt or if damage? everyone is in the streets kinda freaked out at the moment and I ma still shaking like a leaf.. That was strong and long!”

*NOTE* Report of phones down, many websites and LISS are VERY slow.

* This event has been reviewed by a seismologist.

Magnitude 5.8 (Preliminary magnitude — update expected within 15 minutes)
Date-Time

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

Location 37.875°N, 77.908°W
Depth 6 km (3.7 miles) set by location program
Region VIRGINIA
Distances

* 15 km (9 miles) S (179°) from Mineral, VA
* 18 km (12 miles) SSE (154°) from Louisa, VA
* 26 km (16 miles) ENE (58°) from Columbia, VA
* 54 km (34 miles) NW (314°) from Richmond, VA
* 139 km (87 miles) SW (214°) from Washington, DC