2026-09-28T12:57:55.01Z37.292835235596-122.198165893561.9manualconfirmedUSGS1.26md1Origin/20260928130006.808966.38595Magnitude/20260928130006.809025.38596USGS11 km SSE of Portola Valley, CAregion namenccatalognc75443797contributorID