QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem803964
USGS iscgem803964
31 Oct 1969, 12:33
175 km WSW of Adak, Alaska
A magnitude 6.5 mw earthquake at 37.6 km depth.
Published location
Where is 175 km WSW 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.
51.308000, -178.997000
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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
iscgem803964
Coordinates
51.308, -178.997
Network
iscgem
Significance
650