QQuakeFacts
USGS iscgem814154

15 Dec 1968, 03:28

220 km SE of Attu Station, Alaska

A magnitude 6.1 mw earthquake at 29.4 km depth.

Depth29.4 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 220 km SE 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.

51.618000, 175.716000

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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
iscgem814154
Coordinates
51.618, 175.716
Network
iscgem
Significance
571