Alaska earthquakes

M3.5 earthquake 73 km SSW of Atka, Alaska

A magnitude 3.5 earthquake struck 73 km SSW of Atka, Alaska on Sun, Sep 27, 2026, 1:09 PM HADT (22:09 UTC), 10 km (6 mi) below the surface.

Map

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The earthquake

Magnitude: 3.5 (ml), minor
Local time: Sun, Sep 27, 2026, 1:09 PM HADT
UTC: 2026-09-27 22:09:02 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.578° N, 174.562° 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: 0.2% of gravity
Peak ground velocity: 0.1 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. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 2.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 34

Nearby

Within 100 km, magnitude 1.5 and up: 7 since this one and 65 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 us6000ty2n (also filed as aka2026teoffn). Read Wed, Sep 30, 2026, 4:13 PM UTC.