Alaska earthquakes

M4.9 earthquake 86 km SSE of Atka, Alaska

A magnitude 4.9 earthquake struck 86 km SSE of Atka, Alaska on Sat, Aug 1, 2026, 2:07 PM HADT (23:07 UTC), 35 km (22 mi) below the surface.

Map

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The earthquake

Magnitude: 4.9 (mb), light
Local time: Sat, Aug 1, 2026, 2:07 PM HADT
UTC: 2026-08-01 23:07:03 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.552° N, 173.510° W
Region: Alaska
Strongest shaking: III, 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: III, weak shaking
Peak ground acceleration: 1.1% of gravity
Peak ground velocity: 0.6 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 6.7 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.03
Depth from: Operator assigned
Station coverage gap: 138°
Stations used: 95

Nearby

Within 100 km, magnitude 1.9 and up: 110 since this one and 142 in the 30 days before it.

After

The first 60 of 110.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000thii (also filed as aka2026pdixdb). Read Tue, Sep 29, 2026, 12:22 PM UTC.