Alaska earthquakes

M3.4 earthquake 35 km SSW of Klukwan, Alaska

A magnitude 3.4 earthquake struck 35 km SSW of Klukwan, Alaska on Sun, Feb 28, 2021, 10:04 PM AKST (07:04 UTC), 2 km (1 mi) below the surface.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.4 (ml), minor
Local time: Sun, Feb 28, 2021, 10:04 PM AKST
UTC: 2021-03-01 07:04:53 UTC
Depth: 2.4 km (1.5 mi), shallow
Epicenter: 59.089° N, 136.029° W
Region: Alaska
Felt reports: 5
Strongest shaking: IV, light 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: IV, light shaking
Peak ground acceleration: 252.0% of gravity
Peak ground velocity: 0.4 cm/s
Map: Automatic

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

Did you feel it?

5 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Stations used: 125

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 11 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 ak0212rcftvl (also filed as us7000deia). Read Tue, Sep 29, 2026, 3:51 AM UTC.