Alaska earthquakes

M1.9 earthquake 37 km WSW of Adak, Alaska

A magnitude 1.9 earthquake struck 37 km WSW of Adak, Alaska on Tue, Mar 17, 2020, 6:08 AM HADT (15:08 UTC), 12 km (7 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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The earthquake

Magnitude: 1.9 (ml), micro
Local time: Tue, Mar 17, 2020, 6:08 AM HADT
UTC: 2020-03-17 15:08:57 UTC
Depth: 11.8 km (7.4 mi), shallow
Epicenter: 51.711° N, 177.105° 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 0.7 km horizontally, 1.0 km in depth
Magnitude uncertainty: ±0.25
Depth from: From location
Station coverage gap: 206°, poorly surrounded by stations
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 168 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event av62147471 (also filed as ak0203jld26y). Read Wed, Sep 30, 2026, 11:00 AM UTC.