Alaska earthquakes

M3.5 earthquake 249 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 249 km SE of Chiniak, Alaska on Sat, Oct 24, 2020, 11:58 AM AKDT (19:58 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.7 251 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 3.5 (ml), minor
Local time: Sat, Oct 24, 2020, 11:58 AM AKDT
UTC: 2020-10-24 19:58:13 UTC
Depth: 22.4 km (13.9 mi), shallow
Epicenter: 56.093° N, 149.262° 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.

Location uncertainty: About 7.4 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 194°, poorly surrounded by stations
Stations used: 73

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 26 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 us6000ccw1 (also filed as ak020dp5t3yx). Read Sat, Sep 26, 2026, 4:29 AM UTC.