Alaska earthquakes

M2.6 earthquake 86 km WSW of Adak, Alaska

A magnitude 2.6 earthquake struck 86 km WSW of Adak, Alaska on Tue, Feb 18, 2020, 10:47 PM HAST (08:47 UTC), 70 km (44 mi) below the surface.

A larger quake followed: M5.0 71 km WNW of Adak, 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: 2.6 (ml), micro
Local time: Tue, Feb 18, 2020, 10:47 PM HAST
UTC: 2020-02-19 08:47:57 UTC
Depth: 70.0 km (43.5 mi), intermediate-depth
Epicenter: 51.587° N, 177.791° 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 7.5 km horizontally, 14.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 191°, poorly surrounded by stations
Stations used: 29

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60008cnq (also filed as ak0202atx0lx). Read Wed, Sep 30, 2026, 4:14 PM UTC.