Alaska earthquakes

M2.3 earthquake 124 km WSW of Adak, Alaska

A magnitude 2.3 earthquake struck 124 km WSW of Adak, Alaska on Thu, Apr 30, 2020, 12:12 PM HADT (21:12 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.2 186 km WSW of Adak, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 2.3 (ml), micro
Local time: Thu, Apr 30, 2020, 12:12 PM HADT
UTC: 2020-04-30 21:12:19 UTC
Depth: 33.1 km (20.5 mi), shallow
Epicenter: 51.410° N, 178.275° 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 4.3 km horizontally, 3.8 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 229°, poorly surrounded by stations
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: 189 in the 60 days after this one and 80 in the 30 days before it.

After

The first 60 of 189.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009pbr (also filed as ak0205kglpj8). Read Tue, Sep 29, 2026, 7:55 PM UTC.