Alaska earthquakes

M4.0 earthquake 95 km ESE of Adak, Alaska

A magnitude 4.0 earthquake struck 95 km ESE of Adak, Alaska on Wed, Jun 10, 2020, 5:17 AM HADT (14:17 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M4.1 19 km SSE of Atka, 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: 4.0 (mb), light
Local time: Wed, Jun 10, 2020, 5:17 AM HADT
UTC: 2020-06-10 14:17:11 UTC
Depth: 34.3 km (21.3 mi), shallow
Epicenter: 51.611° N, 175.313° 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 3.8 km horizontally, 4.5 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 93°
Stations used: 155

Nearby

Within 100 km, magnitude 1.5 and up: 164 in the 60 days after this one and 61 in the 30 days before it.

After

The first 60 of 164.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000a9ba (also filed as ak0207g5hyiw). Read Tue, Sep 29, 2026, 12:00 PM UTC.