Alaska earthquakes

M3.5 earthquake 275 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 275 km SE of Chiniak, Alaska on Mon, Feb 5, 2018, 3:18 PM AKST (00:18 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.4 252 km ESE 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: 3.5 (ml), minor
Local time: Mon, Feb 5, 2018, 3:18 PM AKST
UTC: 2018-02-06 00:18:07 UTC
Depth: 7.6 km (4.7 mi), shallow
Epicenter: 55.742° N, 149.332° W
Region: Alaska
Felt reports: 2
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 8.4 km horizontally, 8.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 199°, poorly surrounded by stations
Stations used: 79

Nearest places

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

Kodiak, AlaskaPopulation 6,253. Forecast295 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d2gb (also filed as ak0181p6zq3c, ak18360027). Read Tue, Sep 29, 2026, 6:40 AM UTC.