QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem889917
USGS iscgem889917
13 Sept 1955, 03:00
36 km E of Adak, Alaska
A magnitude 6 mw earthquake at 55 km depth.
Published location
Where is 36 km E 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.
51.841000, -176.114000
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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
iscgem889917
Coordinates
51.841, -176.114
Network
iscgem
Significance
556