Alaska earthquakes

M2.3 earthquake 20 km SSW of Anchorage, Alaska

A magnitude 2.3 earthquake struck 20 km SSW of Anchorage, Alaska on Thu, Dec 28, 2017, 6:35 PM AKST (03:35 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M3.5 6 km NNW of Houston, Alaska. This one was a foreshock.

Anchorage 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: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Thu, Dec 28, 2017, 6:35 PM AKST
UTC: 2017-12-29 03:35:52 UTC
Depth: 38.0 km (23.6 mi), shallow
Epicenter: 61.054° N, 150.087° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.3	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.3	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 74

Nearest places

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

Anchorage, AlaskaPopulation 289,600. Forecast21 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 120 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017goe2w6t (also filed as ak17726348, us1000bxgm). Read Sat, Oct 3, 2026, 9:43 AM UTC.