Alaska earthquakes

M2.8 earthquake 70 km ENE of Adak, Alaska

A magnitude 2.8 earthquake struck 70 km ENE of Adak, Alaska on Sat, Apr 18, 2020, 10:08 PM HADT (07:08 UTC), 113 km (70 mi) below the surface.

A larger quake followed: M4.8 103 km NNE 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: 2.8 (ml), micro
Local time: Sat, Apr 18, 2020, 10:08 PM HADT
UTC: 2020-04-19 07:08:35 UTC
Depth: 113.1 km (70.3 mi), intermediate-depth
Epicenter: 52.160° N, 175.711° 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 13.2 km horizontally, 6.1 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 174°
Stations used: 33

Nearby

Within 100 km, magnitude 1.5 and up: 137 in the 60 days after this one and 54 in the 30 days before it.

After

The first 60 of 137.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009dvt (also filed as ak020521bzzh). Read Wed, Sep 30, 2026, 5:32 PM UTC.