2026-08-18T09:30:28.6Z37.396167755127-122.201332092285.8299999237061manualconfirmedUSGS1.95md1Origin/20260818093250.035391.420785Magnitude/20260818093250.035452.420786USGS3 km ENE of Portola Valley, CAregion namenccatalognc75420527contributorID