Alaska earthquakes

M3.0 earthquake 278 km W of Adak, Alaska

A magnitude 3.0 earthquake struck 278 km W of Adak, Alaska on Thu, Aug 6, 2020, 7:15 AM GMT+12 (19:15 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: 3.0 (ml), minor
Local time: Thu, Aug 6, 2020, 7:15 AM GMT+12
UTC: 2020-08-05 19:15:55 UTC
Depth: 72.9 km (45.3 mi), intermediate-depth
Epicenter: 51.546° N, 179.371° 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 8.5 km horizontally, 7.2 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 113°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 169 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 169.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bi3q (also filed as ak020a0uk84y). Read Tue, Sep 29, 2026, 11:03 PM UTC.