2025-12-09T06:23:28.74Z37.7516670227051-121.9416656494146.82000017166138manualconfirmedUSGS2.49md1Origin/20251209062539.956884.179309Magnitude/20251209062539.956936.179310USGS4 km SE of San Ramon, CAregion namenccatalognc75277141contributorID