Alaska earthquakes

M5.6 earthquake 26 km WSW of Cordova, Alaska

A magnitude 5.6 earthquake struck 26 km WSW of Cordova, Alaska on Sat, Oct 10, 1964, 10:06 AM GMT-10 (20:06 UTC), 15 km (9 mi) below the surface.

Cordova forecastMore in Alaska

Map

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

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The earthquake

Magnitude
5.6 (Mw, moment), moderate
Magnitude from
ISC-GEM global catalog
Local time
UTC
1964-10-10 20:06:38 UTC
Depth
15.2 km (9.4 mi), shallow
Epicenter
60.419° N, 146.171° W
Region
Alaska
Strongest shaking
VI, strong shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
5.63Mw, momentISC-GEM global catalogPreferred · Final · ±0.56
5.4mb, body-waveUSGS historic United States catalogFinal

What happened

The USGS’s account of the effects of this earthquake.

Maximum observed Modified Mercalli Intensity (MMI) I

From the USGS event page for iscgem863416. U.S. Geological Survey text and figures are in the public domain.

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
14.2% of gravity
Peak ground velocity
2.0 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
±0.56
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: 0 in the 60 days after this one and 1 in the 30 days before it.

Before

  1. 6.153 km E of Chenega, Alaska · 22663 days ago · 14 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem863416 (also filed as ushis2725). Read Sun, Oct 4, 2026, 6:54 AM UTC.