QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem814226
USGS iscgem814226

17 Dec 1968, 13:02

70 km E of Port Alsworth, Alaska

A magnitude 6.3 mw earthquake at 109.6 km depth.

Depth109.6 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated9 May 2022Latest timestamp stored in this record

Published location

Where is 70 km E of Port Alsworth, 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.

60.146000, -153.058000

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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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Continue exploring

Nearby events with a similar magnitude

M 6.25

37 km NNW of Aleneva, Alaska

M 6.3

Event 18 Novarupta-Mount Katmai area, Alaska Peninsula

M 6.3

Event 35 Novarupta-Mount Katmai area, Alaska Peninsula

M 6.2

Event 38 Novarupta-Mount Katmai area, Alaska Peninsula

M 6.2

Event 50 Novarupta-Mount Katmai area, Alaska Peninsula

M 6.31

Event 17 Novarupta-Mount Katmai area, Alaska Peninsula

Catalog fields and provenance
Event ID
iscgem814226
Coordinates
60.146, -153.058
Network
iscgem
Significance
601