Alaska earthquakes

M3.7 earthquake 103 km NE of Adak, Alaska

A magnitude 3.7 earthquake struck 103 km NE of Adak, Alaska on Tue, Mar 15, 2022, 2:57 AM HADT (11:57 UTC), 245 km (152 mi) below the surface.

A larger quake followed: M4.5 62 km NNW of Atka, 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: 3.7 (mb), minor
Local time: Tue, Mar 15, 2022, 2:57 AM HADT
UTC: 2022-03-15 11:57:30 UTC
Depth: 245.0 km (152.3 mi), intermediate-depth
Epicenter: 52.619° N, 175.732° W
Region: Alaska
Strongest shaking: I, not felt 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: I, not felt shaking
Peak ground acceleration: 0.0% of gravity
Peak ground velocity: -5.7 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 12.1 km horizontally, 8.8 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 77°
Stations used: 100

Nearby

Within 100 km, magnitude 1.5 and up: 56 in the 60 days after this one and 35 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000h5ta (also filed as ak0223eknqdk). Read Thu, Oct 1, 2026, 12:45 AM UTC.