A U.S. Geological Survey map shows the location of Ridgecrest, California, which was the epicen …

A U.S. Geological Survey map shows the location of Ridgecrest, California, which was the epicen ...

A U.S. Geological Survey map shows the location of Ridgecrest, California, which was the epicenter of a 6.4-magnitude earthquake on Thursday, July 4, 2019. (USGS)