6.4-magnitude earthquake hits southern California, strongest in 20 years

A police cordon is seen at the affected area after the quake in Ridgecrest, California, the United States, July 4, 2019. A 6.4-magnitude earthquake jolted a remote area in the Searles Valley in the U.S. western state of California on Thursday, causing injuries and damage, and so far there has been no report of casualties in Los Angeles downtown and nearby areas. (Xinhua/Qian Weizhong)