2026-04-10T19:03:58.94Z46.005666666667-112.47983333333-0.04manualconfirmedUSGS1.41ml1Origin/20260413153309.129014.234338Magnitude/20260413153309.129082.234339USGS4 km E of Butte, Montanaregion namembcatalogmb90131218contributorID