Alaska earthquakes

M4.7 earthquake 251 km W of Adak, Alaska

A magnitude 4.7 earthquake struck 251 km W of Adak, Alaska on Fri, Apr 17, 2020, 5:06 PM GMT+12 (05:06 UTC), 145 km (90 mi) below the surface.

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The earthquake

Magnitude: 4.7 (mb), light
Local time: Fri, Apr 17, 2020, 5:06 PM GMT+12
UTC: 2020-04-17 05:06:32 UTC
Depth: 144.6 km (89.9 mi), intermediate-depth
Epicenter: 51.907° N, 179.712° 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 7.4 km horizontally, 4.9 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 95°
Stations used: 137

Nearby

Within 100 km, magnitude 1.7 and up: 94 in the 60 days after this one and 37 in the 30 days before it.

After

The first 60 of 94.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70008y6d (also filed as ak0204yp206a). Read Wed, Sep 30, 2026, 10:38 AM UTC.