Alaska earthquakes

M4.8 earthquake 117 km SSW of Atka, Alaska

A magnitude 4.8 earthquake struck 117 km SSW of Atka, Alaska on Mon, Mar 23, 2020, 10:11 PM HADT (07:11 UTC), 20 km (12 mi) below the surface.

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The earthquake

Magnitude: 4.8 (mb), light
Local time: Mon, Mar 23, 2020, 10:11 PM HADT
UTC: 2020-03-24 07:11:15 UTC
Depth: 19.8 km (12.3 mi), shallow
Epicenter: 51.305° N, 175.104° 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 5.3 km horizontally, 3.6 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 94°
Stations used: 151

Nearby

Within 100 km, magnitude 1.8 and up: 112 in the 60 days after this one and 35 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 us70008eze (also filed as ak0203v1dl0i, iscgem617812790). Read Wed, Sep 30, 2026, 9:11 PM UTC.