QQuakeFacts
USGS iscgem870039

29 Mar 1964, 07:04

89 km S of Akhiok, Alaska

A magnitude 6.2 mw earthquake at 21.9 km depth.

Depth21.9 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 89 km S of Akhiok, 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.

56.148000, -154.374000

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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
iscgem870039
Coordinates
56.148, -154.374
Network
iscgem
Significance
584