Alaska earthquakes

M5.6 earthquake 47 km ESE of Chiniak, Alaska

A magnitude 5.6 earthquake struck 47 km ESE of Chiniak, Alaska on Mon, Apr 13, 1964, 4:05 AM GMT-10 (14:05 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M5.8 9 km ENE of Port Lions, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.6 (mw), moderate
Local time: Mon, Apr 13, 1964, 4:05 AM GMT-10
UTC: 1964-04-13 14:05:02 UTC
Depth: 26.8 km (16.7 mi), shallow
Epicenter: 57.479° N, 151.535° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Magnitude uncertainty: ±0.20
Depth from: From location

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.6 and up: 5 in the 60 days after this one and 14 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem868710 (also filed as ushis2690). Read Sat, Sep 26, 2026, 11:11 PM UTC.