QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00032u7
USGS usp00032u7
27 Feb 1987, 08:31
67 km SW of Unalaska, Alaska
A magnitude 6.9 mw earthquake at 10 km depth.
Published location
Where is 67 km SW 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.
53.470000, -167.291000
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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
usp00032u7
Coordinates
53.47, -167.291
Network
us
Significance
732