From Philly.com: Phila. area rocked by Va. quake
We don't seem to have incurred a lot of actual damage, though there's at least one broken window on the Blue Cross building. Yikes. Heck, I'm just glad that we didn't have a bunch of reports of windows detaching themselves when the tall buildings flexed and swayed. There's always so much foot traffic in Center City, if THAT had happened there'd surely have been casualties. Considering that buildings in this area are not necessarily constructed to withstand earthquakes, we got off pretty easy in this region.