Alaska earthquakes

M5.0 earthquake 228 km SE of Chiniak, Alaska

A magnitude 5.0 earthquake struck 228 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 2:37 AM AKST (11:37 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M5.5 228 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: 5.0 (mb), moderate
Local time: Tue, Jan 23, 2018, 2:37 AM AKST
UTC: 2018-01-23 11:37:44 UTC
Depth: 16.9 km (10.5 mi), shallow
Epicenter: 56.100° N, 149.753° W
Region: Alaska
Strongest shaking: II, 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: II, weak shaking
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 6.3 km horizontally, 2.4 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 141°
Stations used: 271

Nearest places

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

Nearby

Within 100 km, magnitude 2.0 and up: at least 200 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cn1e (also filed as ak18176249, ak0181284s6w). Read Wed, Sep 30, 2026, 3:47 AM UTC.