Alaska earthquakes

M2.9 earthquake 81 km NE of Adak, Alaska

A magnitude 2.9 earthquake struck 81 km NE of Adak, Alaska on Fri, Oct 16, 2020, 3:36 PM HADT (00:36 UTC), 185 km (115 mi) below the surface.

A larger quake followed: M3.9 63 km ESE 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: 2.9 (ml), micro
Local time: Fri, Oct 16, 2020, 3:36 PM HADT
UTC: 2020-10-17 00:36:36 UTC
Depth: 185.2 km (115.1 mi), intermediate-depth
Epicenter: 52.313° N, 175.681° 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 13.1 km horizontally, 11.4 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 209°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 55 in the 30 days before it.

After

The first 60 of 66.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000c7uj (also filed as ak020dd9ltbx). Read Sun, Sep 27, 2026, 7:57 PM UTC.