2025-12-20T16:10:32.79Z37.7466659545898-121.940666198739.10999965667725manualconfirmedUSGS2.61md1Origin/20251220161307.192965.8815Magnitude/20251220161307.193013.8816USGS5 km SE of San Ramon, CAregion namenccatalognc75283461contributorID