2026-08-04T04:17:51.24Z37.851665496826-122.237663269048.6400003433228manualconfirmedUSGS0.75md1Origin/20260804041932.893125.287165Magnitude/20260804041932.893186.287166USGS3 km N of Piedmont, CAregion namenccatalognc75410987contributorID