QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem868364
USGS iscgem868364
4 Apr 1964, 18:59
70 km SSW of Akhiok, Alaska
A magnitude 6.5 mw earthquake at 22.6 km depth.
Published location
Where is 70 km SSW of Akhiok, 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.
56.338000, -154.493000
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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
iscgem868364
Coordinates
56.338, -154.493
Network
iscgem
Significance
648