QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem884026
USGS iscgem884026
20 Mar 1958, 01:38
234 km SSE of Atka, Alaska
A magnitude 6.2 mw earthquake at 15.3 km depth.
Published location
Where is 234 km SSE of Atka, 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.
50.265000, -172.867000
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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
iscgem884026
Coordinates
50.265, -172.867
Network
iscgem
Significance
591