Alaska earthquakes

M4.8 earthquake 184 km WSW of Adak, Alaska

A magnitude 4.8 earthquake struck 184 km WSW of Adak, Alaska on Sun, Feb 14, 2021, 9:13 AM HAST (19:13 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M5.6 209 km WSW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 4.8 (mww), light
Local time: Sun, Feb 14, 2021, 9:13 AM HAST
UTC: 2021-02-14 19:13:18 UTC
Depth: 22.6 km (14.1 mi), shallow
Epicenter: 51.442° N, 179.212° 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 8.5 km horizontally, 5.2 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 122°
Stations used: 110

Nearby

Within 100 km, magnitude 1.8 and up: 95 in the 60 days after this one and 31 in the 30 days before it.

After

The first 60 of 95.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dhn0 (also filed as ak02122qkq30). Read Fri, Sep 25, 2026, 9:51 PM UTC.