2026-04-06T19:02:23.34Z46.004333333333-112.47616666667-2manualconfirmedUSGS1.3ml1Origin/20260406192536.574385.159611Magnitude/20260406192536.574448.159612USGS4 km E of Butte, Montanaregion namembcatalogmb90130178contributorID