Alaska earthquakes

M2.6 earthquake 278 km W of Adak, Alaska

A magnitude 2.6 earthquake struck 278 km W of Adak, Alaska on Tue, Aug 18, 2020, 4:12 AM GMT+12 (16:12 UTC), 73 km (45 mi) below the surface.

A larger quake followed: M4.6 294 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: 2.6 (ml), micro
Local time: Tue, Aug 18, 2020, 4:12 AM GMT+12
UTC: 2020-08-17 16:12:28 UTC
Depth: 73.2 km (45.5 mi), intermediate-depth
Epicenter: 51.547° N, 179.368° E
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 3.5 km horizontally, 5.5 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 115°
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: 158 in the 60 days after this one and 60 in the 30 days before it.

After

The first 60 of 158.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bhp8 (also filed as ak020akn7e12). Read Tue, Sep 29, 2026, 8:17 AM UTC.