QQuakeFacts
USGS iscgem859324

4 Feb 1965, 12:06

81 km W of Attu Station, Alaska

A magnitude 6.5 mw earthquake at 27.1 km depth.

Depth27.1 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 81 km W 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.

52.752000, 171.991000

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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
iscgem859324
Coordinates
52.752, 171.991
Network
iscgem
Significance
640