2026-02-04T06:10:07.48Z37.759334564209-121.9423370361338.4399995803833manualconfirmedUSGS1.86md1Origin/20260204061151.946351.52259Magnitude/20260204061151.946416.52260USGS4 km SE of San Ramon, CAregion namenccatalognc75308147contributorID