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USGS iscgem824251

23 Apr 1968, 21:29

124 km SSE of Halibut Cove, Alaska

A magnitude 6.6 mw earthquake at 18.8 km depth.

Depth18.8 kmPublished hypocentral depth

Tsunami flagNot flaggedUSGS catalog flag, not a current warning

Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 124 km SSE of Halibut Cove, 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.

58.647000, -150.082000

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Map data © OpenStreetMap contributors

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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Nearby events with a similar magnitude

57 km ENE of Whittier, Alaska

3 km SW of Bear Creek, Alaska

6 km WNW of Nikiski, Alaska

24 km ENE of Sterling, Alaska

78 km ENE of Ouzinkie, Alaska

31 km SSW of Glacier View, Alaska

Catalog fields and provenance

Event ID

iscgem824251

Coordinates

58.647, -150.082

Network

iscgem

Significance

676