2026-03-31T21:14:57.93Z37.772998809815-121.942169189456.8400001525879manualconfirmedUSGS1.99md1Origin/20260331211709.419446.80643Magnitude/20260331211709.419508.80644USGS3 km ESE of San Ramon, CAregion namenccatalognc75336547contributorID