Alaska earthquakes

M3.8 earthquake 183 km WNW of Adak, Alaska

A magnitude 3.8 earthquake struck 183 km WNW of Adak, Alaska on Tue, Mar 15, 2022, 3:36 AM HADT (12:36 UTC), 221 km (137 mi) below the surface.

A larger quake followed: M3.9 184 km WNW 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: 3.8 (mb), minor
Local time: Tue, Mar 15, 2022, 3:36 AM HADT
UTC: 2022-03-15 12:36:57 UTC
Depth: 220.8 km (137.2 mi), intermediate-depth
Epicenter: 52.271° N, 179.233° W
Region: Alaska
Strongest shaking: II, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: II, weak shaking
Peak ground acceleration: 0.0% of gravity
Peak ground velocity: -5.2 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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 9.5 km horizontally, 6.7 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 125°
Stations used: 110

Nearby

Within 100 km, magnitude 1.5 and up: 62 in the 60 days after this one and 15 in the 30 days before it.

After

The first 60 of 62.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000h5tb (also filed as ak0223el4q2o). Read Wed, Sep 30, 2026, 10:53 PM UTC.