QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0002tq1
USGS usp0002tq1
8 May 1986, 06:37
106 km SE of Adak, Alaska
A magnitude 6.4 mw earthquake at 18.1 km depth.
Published location
Where is 106 km SE of Adak, 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.
51.336000, -175.363000
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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
usp0002tq1
Coordinates
51.336, -175.363
Network
us
Significance
630