2026-08-17T18:06:58.83Z37.434833526611-122.462997436527.0100002288818manualconfirmedUSGS1.3md1Origin/20260817180929.632625.412593Magnitude/20260817180929.632686.412594USGS4 km SW of Half Moon Bay, CAregion namenccatalognc75420167contributorID