Alaska earthquakes

M4.2 earthquake 247 km WSW of Adak, Alaska

A magnitude 4.2 earthquake struck 247 km WSW of Adak, Alaska on Sun, Jan 26, 2020, 4:24 AM GMT-12 (16:24 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 246 km WSW of Adak, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 4.2 (mb), light
Local time: Sun, Jan 26, 2020, 4:24 AM GMT-12
UTC: 2020-01-26 16:24:02 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.908° N, 179.832° 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 2.8 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.30
Depth from: Operator assigned
Station coverage gap: 195°, poorly surrounded by stations
Stations used: 38

Nearby

Within 100 km, magnitude 1.5 and up: 131 in the 60 days after this one and 109 in the 30 days before it.

After

The first 60 of 131.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60007hru (also filed as ak020179n415). Read Wed, Sep 30, 2026, 11:55 PM UTC.