2025-12-21T22:26:46.52Z37.747833251953097-121.9463348388679.47999954223633manualconfirmedUSGS1.9md1Origin/20251221222916.013537.19267Magnitude/20251221222916.013593.19268USGS5 km SE of San Ramon, CAregion namenccatalognc75284376contributorID