Alaska earthquakes

M3.6 earthquake 247 km SE of Chiniak, Alaska

A magnitude 3.6 earthquake struck 247 km SE of Chiniak, Alaska on Sun, Sep 30, 2018, 1:50 AM AKDT (09:50 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.8 218 km SE of Chiniak, Alaska. This one was a foreshock.

Kodiak 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: 3.6 (ml), minor
Local time: Sun, Sep 30, 2018, 1:50 AM AKDT
UTC: 2018-09-30 09:50:32 UTC
Depth: 7.8 km (4.8 mi), shallow
Epicenter: 55.809° N, 149.916° 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 8.4 km horizontally, 8.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 202°, poorly surrounded by stations
Stations used: 122

Nearest places

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

Kodiak, AlaskaPopulation 6,253. Forecast267 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 186 in the 30 days before it.

After

The first 60 of at least 199.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000h4kh (also filed as ak018cjndg29, ak20267416, aacse018cjndg29). Read Thu, Sep 24, 2026, 1:04 PM UTC.