2025-12-16T02:12:54.59Z37.7571678161621-121.9403305053718.52000045776367manualconfirmedUSGS2.38md1Origin/20251216021506.311315.240645Magnitude/20251216021506.311367.240646USGS4 km SE of San Ramon, CAregion namenccatalognc75280581contributorID