2025-12-21T03:23:21.87Z37.7546653747559-121.9606704711918.39000034332275manualconfirmedUSGS1.49md1Origin/20251221032538.5494.12851Magnitude/20251221032538.54945.12852USGS3 km SSE of San Ramon, CAregion namenccatalognc75283756contributorID