Alaska earthquakes

M3.1 earthquake 210 km W of Adak, Alaska

A magnitude 3.1 earthquake struck 210 km W of Adak, Alaska on Tue, Jul 14, 2020, 1:16 PM HADT (22:16 UTC), 205 km (127 mi) below the surface.

A larger quake followed: M4.9 170 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: 3.1 (ml), minor
Local time: Tue, Jul 14, 2020, 1:16 PM HADT
UTC: 2020-07-14 22:16:31 UTC
Depth: 204.8 km (127.3 mi), intermediate-depth
Epicenter: 51.881° N, 179.692° 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 14.7 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 161°
Stations used: 36

Nearby

Within 100 km, magnitude 1.5 and up: 121 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 121.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b5r0 (also filed as ak02090ij277). Read Tue, Sep 29, 2026, 2:17 AM UTC.