Alaska earthquakes

M6.3 earthquake 60 km SW of Cordova, Alaska

A magnitude 6.3 earthquake struck 60 km SW of Cordova, Alaska on Sat, Mar 28, 1964, 4:47 AM GMT-10 (14:47 UTC), 10 km (6 mi) below the surface.

Cordova forecast More in Alaska

Map

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

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The earthquake

Magnitude: 6.3 (mw), strong
Local time: Sat, Mar 28, 1964, 4:47 AM GMT-10
UTC: 1964-03-28 14:47:38 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 60.227° N, 146.660° W
Region: Alaska
Strongest shaking: VI, strong shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VI, strong shaking
Peak ground acceleration: 25.2% of gravity
Peak ground velocity: 2.7 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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: ±0.26
Depth from: From location

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 14 in the 60 days after this one and 6 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem869938 (also filed as ushis2661). Read Tue, Sep 22, 2026, 10:02 AM UTC.