Earthquakes have shaken both coasts of the United States since the afternoon of Aug. 5 — rattling areas near the country’s two largest metro regions. In Southern California, a quake struck ...

Multiple earthquakes shook Southern California hours after a tremor was felt on the East Coast on Aug. 5, according to data ...

Two earthquakes, a 3.5-magnitude in Ontario and a 3.7-magnitude in Lytle Creek, shook San Bernardino County overnight.