2026-03-29T21:36:53.45Z37.757167816162-121.940498352057.8299999237061manualconfirmedUSGS1.25md1Origin/20260329213917.582724.55547Magnitude/20260329213917.582789.55548USGS4 km SE of San Ramon, CAregion namenccatalognc75335182contributorID