QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem775639
USGS iscgem775639
24 Mar 1972, 04:38
77 km ESE of Chignik, Alaska
A magnitude 6.4 mw earthquake at 69.6 km depth.
Published location
Where is 77 km ESE of Chignik, 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.
56.132000, -157.190000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
iscgem775639
Coordinates
56.132, -157.19
Network
iscgem
Significance
622