Alaska earthquakes

M3.5 earthquake 163 km W of Nikolski, Alaska

A magnitude 3.5 earthquake struck 163 km W of Nikolski, Alaska on Thu, Sep 17, 2026, 5:34 AM HADT (14:34 UTC), 95 km (59 mi) below the surface.

A larger quake followed: M4.1 173 km W of Nikolski, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.5 (ml), minor
Local time: Thu, Sep 17, 2026, 5:34 AM HADT
UTC: 2026-09-17 14:34:22 UTC
Depth: 95.1 km (59.1 mi), intermediate-depth
Epicenter: 52.827° N, 171.278° 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: 0.1% of gravity
Peak ground velocity: 0.0 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 16.6 km horizontally, 16.3 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 167°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 14 since 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 us7000ti2d (also filed as aka2026slmvhn). Read Tue, Sep 22, 2026, 8:52 PM UTC.