2026-09-01T06:19:44.02Z39.464332580566-121.217666625987.0700001716614manualconfirmedUSGS2.32md1Origin/20260901062145.501882.50210Magnitude/20260901062145.501943.50211USGS4 km E of Challenge-Brownsville, CAregion namenccatalognc75428072contributorID