2026-02-03T02:33:27.38Z37.7641677856445-121.9319992065436.84000015258789manualconfirmedUSGS1.83md1Origin/20260203024357.277883.42091Magnitude/20260203024357.277961.42092USGS4 km ESE of San Ramon, CAregion namenccatalognc75306396contributorID