2025-12-20T19:06:36.86Z37.7498321533203-121.9424972534189.22000026702881manualconfirmedUSGS2.13md1Origin/20251220190855.19321.9871Magnitude/20251220190855.193261.9872USGS5 km SE of San Ramon, CAregion namenccatalognc75283526contributorID