Alaska earthquakes

M1.7 earthquake 78 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 78 km W of Adak, Alaska on Wed, Mar 11, 2020, 11:54 AM HADT (20:54 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M5.0 71 km WNW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 1.7 (ml), micro
Local time: Wed, Mar 11, 2020, 11:54 AM HADT
UTC: 2020-03-11 20:54:07 UTC
Depth: 3.7 km (2.3 mi), shallow
Epicenter: 51.851° N, 177.771° 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 0.3 km horizontally, 0.3 km in depth
Magnitude uncertainty: ±0.25
Depth from: From location
Station coverage gap: 147°
Stations used: 11

Nearby

Within 100 km, magnitude 1.5 and up: 166 in the 60 days after this one and 155 in the 30 days before it.

After

The first 60 of 166.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event av70877039 (also filed as ak02039rdwfp). Read Wed, Sep 30, 2026, 7:53 AM UTC.