Alaska earthquakes

M2.5 earthquake 73 km SW of Adak, Alaska

A magnitude 2.5 earthquake struck 73 km SW of Adak, Alaska on Wed, Apr 15, 2020, 8:52 PM HADT (05:52 UTC), 37 km (23 mi) below the surface.

A larger quake followed: M5.0 141 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Wed, Apr 15, 2020, 8:52 PM HADT
UTC: 2020-04-16 05:52:20 UTC
Depth: 37.0 km (23.0 mi), shallow
Epicenter: 51.456° N, 177.454° 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 4.8 km horizontally, 17.6 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 211°, poorly surrounded by stations
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 105 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009bil (also filed as ak0204x1shlz). Read Wed, Sep 30, 2026, 2:47 AM UTC.