2026-08-04T21:46:44.15Z37.970500946045-122.0455017089815.039999961853manualconfirmedUSGS1.47md1Origin/20260804214847.416235.292705Magnitude/20260804214847.416295.292706USGS3 km W of Concord, CAregion namenccatalognc75411407contributorID