Shaking From April's New Jersey Quake Went Oddly Far, Raising Questions on Regional Hazard

We expected some property damage—chimneys knocked down, walls cracked or plaster fallen, but there were no obvious signs. It was a surprising response for a magnitude 4.8 earthquake.

There was some peculiar behavior, as the U.S. Northeast isn't accustomed to earthquakes of this magnitude, which led to widespread alarm in heavily populated areas.

Read at State of the Planet