2025-08-18T05:56:59.87Z37.3308333333333-121.6048333333336.8manualconfirmedUSGS0.85md1Origin/20250818193607.971309.287585Magnitude/20250818193607.971361.287586USGS20 km ESE of Alum Rock, CAregion namenccatalognc75225322contributorID