Alaska earthquakes

M3.4 earthquake 21 km W of Tyonek, Alaska

A magnitude 3.4 earthquake struck 21 km W of Tyonek, Alaska on Tue, Oct 16, 2018, 10:33 AM AKDT (18:33 UTC), 70 km (44 mi) below the surface.

A larger quake followed: M7.1 1 km SE of Point MacKenzie, 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: 3.4 (ml), minor
Local time: Tue, Oct 16, 2018, 10:33 AM AKDT
UTC: 2018-10-16 18:33:06 UTC
Depth: 70.1 km (43.6 mi), intermediate-depth
Epicenter: 61.087° N, 151.526° 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.

Stations used: 175

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and 122 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018da986ru (also filed as ak20284999, us1000hd0g). Read Wed, Sep 30, 2026, 4:13 AM UTC.