2026-05-31T08:22:38.03Z37.333999633789-122.21833038338.7299995422363manualconfirmedUSGS1.03md1Origin/20260531082500.000923.16809Magnitude/20260531082500.000988.16810USGS6 km SSE of Portola Valley, CAregion namenccatalognc75368656contributorID