Alaska earthquakes

M4.2 earthquake 150 km NE of Atka, Alaska

A magnitude 4.2 earthquake struck 150 km NE of Atka, Alaska on Mon, Jul 25, 2022, 4:21 AM HADT (13:21 UTC), 212 km (132 mi) below the surface.

Map

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The earthquake

Magnitude: 4.2 (mb), light
Local time: Mon, Jul 25, 2022, 4:21 AM HADT
UTC: 2022-07-25 13:21:34 UTC
Depth: 211.8 km (131.6 mi), intermediate-depth
Epicenter: 53.105° N, 172.546° 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 9.0 km horizontally, 6.8 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 119°
Stations used: 112

Nearby

Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 10 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 us7000htb4 (also filed as ak0229gwkp7w). Read Wed, Sep 30, 2026, 12:21 AM UTC.