2025-12-20T04:08:05.94Z37.7591667175293-121.9426651000984.59000015258789manualconfirmedUSGS1.43md1Origin/20251220041102.983418.4607Magnitude/20251220041102.983465.4608USGS4 km SE of San Ramon, CAregion namenccatalognc75283076contributorID