Alaska earthquakes

M4.8 earthquake 288 km SE of Chiniak, Alaska

A magnitude 4.8 earthquake struck 288 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 3:19 AM AKST (12:19 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M5.3 254 km SE of Chiniak, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.8 (mb), light
Local time
UTC
2018-01-23 12:19:27 UTC
Depth
5.7 km (3.6 mi), shallow
Epicenter
55.666° N, 149.171° W
Region
Alaska
Felt reports
3
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 7.3 km horizontally, 4.8 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
149°
Stations used
206

Nearby

Within 100 km, magnitude 1.8 and up: at least 202 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cn20 (also filed as ak18177529, ak018128mbqo). Read Tue, Sep 29, 2026, 6:55 AM UTC.