2026-03-31T03:27:00.89Z37.752334594727-121.933334350598.5100002288818manualconfirmedUSGS1.79md1Origin/20260331032947.593062.71459Magnitude/20260331032947.593126.71460USGS5 km SE of San Ramon, CAregion namenccatalognc75336057contributorID