2025-12-21T02:41:21.85Z37.7615013122559-121.9528350830085.38000011444092manualconfirmedUSGS1.75md1Origin/20251221024313.026017.12635Magnitude/20251221024313.026068.12636USGS3 km SE of San Ramon, CAregion namenccatalognc75283706contributorID