Alaska earthquakes

M2.7 earthquake 109 km W of Adak, Alaska

A magnitude 2.7 earthquake struck 109 km W of Adak, Alaska on Mon, Sep 14, 2020, 7:11 PM HADT (04:11 UTC), 177 km (110 mi) below the surface.

A larger quake followed: M4.8 135 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Mon, Sep 14, 2020, 7:11 PM HADT
UTC: 2020-09-15 04:11:28 UTC
Depth: 176.7 km (109.8 mi), intermediate-depth
Epicenter: 51.959° N, 178.222° 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, 4.7 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 160°
Stations used: 40

Nearby

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 89 in the 30 days before it.

After

The first 60 of 112.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000c1f7 (also filed as ak020bwen1ii). Read Sun, Sep 27, 2026, 10:35 PM UTC.