According to the California Earthquake Authority, there are more than 1.2 million homes built before 1980 that are in high-hazard areas, vulnerable to collapse or destruction by a strong earthquake.

The Greek island of Santorini was struck by the latest in a string of earthquakes Tuesday, this time a 4.8 temblor. The government said it will backstop the island destination's tourist industry.

A major, 7.6-magnitude earthquake struck in the Caribbean Sea on Saturday and triggered a tsunami advisory in Puerto Rico and ...