2026-10-19T02:35:44.12Z37.775165557861-121.983001708988.680000305175801manualconfirmedUSGS1.71md1Origin/20261019023819.354216.78307Magnitude/20261019023819.354279.78308USGS1 km SW of San Ramon, CAregion namenccatalognc75451991contributorID