QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem901282
USGS iscgem901282
16 Apr 1940, 07:07
80 km SSE of Attu Station, Alaska
A magnitude 7 mw earthquake at 30 km depth.
Published location
Where is 80 km SSE of Attu Station, 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.
52.224000, 173.778000
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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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Catalog fields and provenance
Event ID
iscgem901282
Coordinates
52.224, 173.778
Network
iscgem
Significance
762