Alaska earthquakes

M3.5 earthquake 252 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 252 km SE of Chiniak, Alaska on Wed, Nov 21, 2018, 1:59 AM AKST (10:59 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M4.2 246 km SE of Chiniak, Alaska. This one was a foreshock.

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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: Wed, Nov 21, 2018, 1:59 AM AKST
UTC: 2018-11-21 10:59:05 UTC
Depth: 26.8 km (16.7 mi), shallow
Epicenter: 56.113° N, 149.177° 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 8.0 km horizontally, 10.3 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 194°, poorly surrounded by stations
Stations used: 145

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 173 in the 60 days after this one and 26 in the 30 days before it.

After

The first 60 of 173.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000huvn (also filed as ak018exnysdd, ak20385703, aacse018exnysdd). Read Tue, Sep 22, 2026, 3:35 PM UTC.