2026-04-20T21:00:03.53Z46.3505-111.5355-3.37manualconfirmedUSGS1.6ml1Origin/20260421161618.106895.67653Magnitude/20260421161618.106959.67654USGS3 km NNW of Townsend, Montanaregion namembcatalogmb90133223contributorID