An 2.7 earthquake shook Hillsdale, N.J. Tuesday afternoon, the USGS said. It happened shortly after 12 p.m. CBS News New York's Nick Caloway reported the ground rumbled in Ridgewood for about five seconds,

When you think of earthquake danger zones in the United States, it's unlikely that New Jersey is at the top of your list. However, the Garden State has been something of a hotbed of seismic activity this week.

While earthquakes are relatively uncommon in the Northeast, the events highlight the region's ongoing seismic activity.