QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem904601
USGS iscgem904601
19 Oct 1935, 04:48
12 km N of Winston, Montana
A magnitude 6.1 mw earthquake at 15 km depth.
Published location
Where is 12 km N of Winston, Montana?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
46.591000, -111.651000
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What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
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Catalog fields and provenance
Event ID
iscgem904601
Coordinates
46.591, -111.651
Network
iscgem
Significance
578