Alaska earthquakes

M4.7 earthquake 225 km SE of Chiniak, Alaska

A magnitude 4.7 earthquake struck 225 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 1:05 AM AKST (10:05 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M5.5 256 km ESE 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: 4.7 (mb), light
Local time: Tue, Jan 23, 2018, 1:05 AM AKST
UTC: 2018-01-23 10:05:19 UTC
Depth: 13.9 km (8.7 mi), shallow
Epicenter: 56.128° N, 149.751° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 7.4 km horizontally, 6.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 139°
Stations used: 177

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 and up: at least 201 in the 60 days after this one and 9 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cmym (also filed as ak018127cfni, ak18174783). Read Tue, Sep 29, 2026, 4:06 PM UTC.