2026-03-12T18:01:44.21Z37.358501434326-121.722167968754.7800002098083manualconfirmedUSGS1.5md1Origin/20260312180408.486165.96540Magnitude/20260312180408.486226.96541USGS9 km E of Alum Rock, CAregion namenccatalognc75326572contributorID