2026-09-06T08:59:47.1Z37.995834350586-121.8923339843815.619999885559manualconfirmedUSGS1.49md1Origin/20260906090146.305968.10539Magnitude/20260906090146.30603.10540USGS4 km S of Pittsburg, CAregion namenccatalognc75430542contributorID