Anyone know how that happened? I thought you needed to be over a fault line?[/quote]
Yes and no.
Earthquakes are common even in tectonically ‘passive’ areas. You probably have many 1-3’s that you never hear about because you don’t typically feel them and they’re below your threshold for detection.
The type of geology in your area affects how you feel the quake as well. Unconsolidated materials such as sands/loams ‘move’ more during an event versus solid bedrock.
There are lots of faults around that area, they are just relatively passive as the mid-atlantic region is not generally tectonically active.[/quote]
Interesting, thanks for the info!