Alaska earthquakes

M3.1 earthquake 2 km SSW of Point MacKenzie, Alaska

A magnitude 3.1 earthquake struck 2 km SSW of Point MacKenzie, Alaska on Mon, Dec 31, 2018, 5:23 AM AKST (14:23 UTC), 46 km (28 mi) below the surface.

A larger quake followed: M5.0 8 km SW of Point MacKenzie, Alaska. This one was a foreshock.

Point MacKenzie 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: 3.1 (ml), minor
Local time: Mon, Dec 31, 2018, 5:23 AM AKST
UTC: 2018-12-31 14:23:06 UTC
Depth: 45.8 km (28.5 mi), shallow
Epicenter: 61.337° N, 149.992° W
Region: Alaska
Felt reports: 16
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
Peak ground acceleration: 274.0% of gravity
Peak ground velocity: 0.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

16 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.

Stations used: 98

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 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 ak018grvmooz (also filed as ak20611208, us2000izfy). Read Tue, Sep 29, 2026, 11:21 PM UTC.