2025-05-31T09:12:27.33Z37.9099998474121-122.0804977416999.3100004196167manualconfirmedUSGS2.11md1Origin/20250531091421.130071.46395Magnitude/20250531091421.130121.46396USGS1 km WNW of Walnut Creek, CAregion namenccatalognc75189036contributorID