QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00007e3
USGS usp00007e3
1 Aug 1974, 06:55
94 km SE of Old Harbor, Alaska
A magnitude 6.3 ms earthquake at 33 km depth.
Published location
Where is 94 km SE of Old Harbor, 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.
56.670000, -152.105000
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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
usp00007e3
Coordinates
56.67, -152.105
Network
us
Significance
611