number of aftershocks so far has been remarkably low since the strongest earthquake to strike the East Coast since World War II.
NEIC agency isn't sure what to expect, but it's likely there will be some more aftershocks for days, if not weeks.
http://www.businessinsider.com/earthquake-tweets-2011-8
Hurricane Irene conditions expected in Carolina in 36 hours
http://www.businessinsider.com/hurricane-watch-map-irene-2011-8
http://www.nbcwashington.com/news/local/Hurricane-Irene-Tracks-Closer-to-the-...
Cracks in Washington DC Monument Obelisk
http://www.nbcwashington.com/news/local/Major-Monuments-Closed-in-DC-for-Quak...
http://www.nbcwashington.com/news/local/A_Seismologist_Explains_the_Virginia_...