QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0002mbh
USGS usp0002mbh
31 Oct 1985, 19:33
74 km SSW of Unalaska, Alaska
A magnitude 6.2 mw earthquake at 30 km depth.
Published location
Where is 74 km SSW of Unalaska, Alaska?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
53.249000, -166.936000
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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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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
usp0002mbh
Coordinates
53.249, -166.936
Network
us
Significance
591