2026-10-28T08:20:06.2Z37.166000366211-121.434165954594.3000001907349manualconfirmedUSGS1.13md1Origin/20261028082144.114497.143834Magnitude/20261028082144.114565.143835USGS18 km ENE of San Martin, CAregion namenccatalognc75458832contributorID