Alaska earthquakes

M3.4 earthquake 291 km ESE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 291 km ESE of Chiniak, Alaska on Sat, Sep 29, 2018, 1:24 AM AKDT (09:24 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M3.9 255 km SE of Chiniak, Alaska. This one was a foreshock.

Anchorage 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), minor
Local time: Sat, Sep 29, 2018, 1:24 AM AKDT
UTC: 2018-09-29 09:24:54 UTC
Depth: 16.9 km (10.5 mi), shallow
Epicenter: 56.448° N, 147.981° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

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 8.9 km horizontally, 8.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 226°, poorly surrounded by stations
Stations used: 78

Nearest places

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

Anchorage, AlaskaPopulation 289,600. Forecast542 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 126 in the 60 days after this one and 73 in the 30 days before it.

After

The first 60 of 126.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000h96s (also filed as ak20266741, ak018chzokfj, aacse018chzokcc). Read Tue, Sep 22, 2026, 7:54 AM UTC.