2026-06-05T04:20:20.33Z37.778831481934-121.941169738777.5900001525879manualconfirmedUSGS1.49md1Origin/20260605042212.800408.57589Magnitude/20260605042212.800472.57590USGS3 km E of San Ramon, CAregion namenccatalognc75371056contributorID