2025-12-08T13:47:09.46Z37.7569999694824-121.9388351440437.73000001907349manualconfirmedUSGS2.18md1Origin/20251208134910.207507.171226Magnitude/20251208134910.20758.171227USGS4 km SE of San Ramon, CAregion namenccatalognc75276576contributorID