California at risk for aftershocks and even more powerful earthquakes

The most powerful earthquake in 20 years hit Southern California on Thursday, and the Ridgecrest area is still experiencing aftershocks. Scientists warn the region is at risk for even more severe quakes. United State Geological Survey seismologist Dr. Susan Hough joined CBSN with details on the risk. Subscribe to the CBS News Channel HERE: Watch CBSN live HERE: Follow CBS News on Instagram HERE: Like CBS News on Facebook H