Alaska earthquakes

M6.3 earthquake 94 km SE of Old Harbor, Alaska

A magnitude 6.3 earthquake struck 94 km SE of Old Harbor, Alaska on Wed, Jul 31, 1974, 8:55 PM GMT-9 (05:55 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude: 6.3 (ms), strong
Local time: Wed, Jul 31, 1974, 8:55 PM GMT-9
UTC: 1974-08-01 05:55:38 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 56.670° N, 152.105° 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.

Depth from: OPERATOR_ASSIGNED
Stations used: 94

Nearest places

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

Nearby

Within 100 km, magnitude 3.3 and up: 27 in the 60 days after this one and 2 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 usp00007e3 (also filed as ushis3286, iscgem738149). Read Wed, Sep 30, 2026, 12:23 PM UTC.