Alaska earthquakes

M3.0 earthquake 17 km NNW of Adak, Alaska

A magnitude 3.0 earthquake struck 17 km NNW of Adak, Alaska on Thu, Mar 19, 2020, 3:33 PM HADT (00:33 UTC), 215 km (133 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: 3.0 (ml), minor
Local time: Thu, Mar 19, 2020, 3:33 PM HADT
UTC: 2020-03-20 00:33:53 UTC
Depth: 214.5 km (133.3 mi), intermediate-depth
Epicenter: 52.020° N, 176.716° 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 14.1 km horizontally, 2.4 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 157°
Stations used: 26

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 131 in the 30 days before it.

After

The first 60 of 171.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70008ipd (also filed as ak0203ob7342). Read Wed, Sep 30, 2026, 1:07 PM UTC.