You weren't listening to AC/DC on all those hoarded sets at once were you?
Maybe your entire house was built on a vibration reducing foundation.
There was an earhquake near Challis, Idaho about 1981. I'm a few hundred miles away from there but my bed hopped/twisted a smidge (we confirmed the timing on the morning news).
Sadly two Challis children were killed when a wall fell down. Idaho is not as geologically active as California and until Mount St. Helens erupted in 1980 almost as quiet as Oregon and Washington. No region is ever free of seismic astivity nor will it til Earth stops spinning.
Some are saying the hotspot around Yellowstone has been retreating slowly/going away as I understood.
Still, tremors are not standard fare in the eastern US. I saw video of a comference and the speaker was from the Seattle or California area and was heard to tell a couple panicky, pushy folks something like, "Keep calm, I've been through this many times where I'm from".
The two reactors were made to shut down automatically. They were before the Japanese disaster and they were back on line later that day. They ran on backup batteries for a short while although that doesn't say how they could hold up vs. the inferior Japanese backup system.
Tsunamis aren't a big threat in Virginia, are they?