Alaska earthquakes

M2.5 earthquake 118 km SW of Adak, Alaska

A magnitude 2.5 earthquake struck 118 km SW of Adak, Alaska on Tue, Jun 23, 2020, 9:32 PM HADT (06:32 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.2 52 km WNW 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: 2.5 (ml), micro
Local time: Tue, Jun 23, 2020, 9:32 PM HADT
UTC: 2020-06-24 06:32:32 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.201° N, 177.961° 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 2.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 212°, poorly surrounded by stations
Stations used: 23

Nearby

Within 100 km, magnitude 1.5 and up: 188 in the 60 days after this one and 110 in the 30 days before it.

After

The first 60 of 188.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000acyy (also filed as ak020836cltj). Read Wed, Sep 30, 2026, 3:46 PM UTC.