2025-12-08T22:55:44.29Z37.8231658935547-122.212165832524.55999994277954manualconfirmedUSGS2.86md1Origin/20251208225918.866918.176205Magnitude/20251208225918.866969.176206USGS2 km E of Piedmont, CAregion namenccatalognc75276931contributorID