Alaska earthquakes

M3.0 earthquake 23 km WSW of Atka, Alaska

A magnitude 3.0 earthquake struck 23 km WSW of Atka, Alaska on Mon, Mar 16, 2020, 11:09 AM HADT (20:09 UTC), 184 km (114 mi) below the surface.

A larger quake followed: M4.8 117 km SSW of Atka, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Mon, Mar 16, 2020, 11:09 AM HADT
UTC: 2020-03-16 20:09:17 UTC
Depth: 184.2 km (114.5 mi), intermediate-depth
Epicenter: 52.103° N, 174.509° 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 14.7 km horizontally, 6.3 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 192°, poorly surrounded by stations
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: 83 in the 60 days after this one and 27 in the 30 days before it.

After

The first 60 of 83.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70008thb (also filed as ak0203i0t0rt). Read Wed, Sep 30, 2026, 6:31 PM UTC.