2025-09-02T09:01:44.85Z37.3095016479492-122.1986694335944.55000019073486manualconfirmedUSGS1.66md1Origin/20250902090608.554147.436216Magnitude/20250902090608.5542.436217USGS9 km S of Portola Valley, CAregion namenccatalognc75231957contributorID