Alaska earthquakes

M3.4 earthquake 86 km ENE of Chignik, Alaska

A magnitude 3.4 earthquake struck 86 km ENE of Chignik, Alaska on Sun, Aug 2, 2026, 2:03 PM AKDT (22:03 UTC), 69 km (43 mi) below the surface.

A larger quake followed: M4.0 119 km E of Chignik, Alaska. This one was a foreshock.

Naknek forecast More in Alaska

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, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Sun, Aug 2, 2026, 2:03 PM AKDT
UTC: 2026-08-02 22:03:26 UTC
Depth: 68.8 km (42.8 mi), shallow
Epicenter: 56.656° N, 157.164° W
Region: Alaska
Strongest shaking: II, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Reviewed · ±0.2 · 95 stations
3.3	ML, local (Richter)	USGS National Earthquake Information Center	Confirmed · ±0.051 · 50 stations

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: 0.1 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.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.2 km horizontally, 3.1 km in depth
Magnitude uncertainty: ±0.20
Station coverage gap: 150°
Stations used: 155

Nearest places

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

Naknek, AlaskaPopulation 544. Forecast231 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 86 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of 86.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event aka2026pfcuob (also filed as us6000thnv). Read Sat, Oct 3, 2026, 10:50 PM UTC.