QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem869836
USGS iscgem869836
28 Mar 1964, 08:10
138 km SE of Halibut Cove, Alaska
A magnitude 6.4 mw earthquake at 20 km depth.
Published location
Where is 138 km SE of Halibut Cove, 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.
58.784000, -149.391000
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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
iscgem869836
Coordinates
58.784, -149.391
Network
iscgem
Significance
622