Alaska earthquakes

M3.8 earthquake 66 km NNW of Aleneva, Alaska

A magnitude 3.8 earthquake struck 66 km NNW of Aleneva, Alaska on Tue, Oct 23, 2018, 9:42 PM AKDT (05:42 UTC), 59 km (37 mi) below the surface.

Kodiak Station 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: 3.8 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Tue, Oct 23, 2018, 9:42 PM AKDT
UTC: 2018-10-24 05:42:56 UTC
Depth: 59.3 km (36.8 mi), shallow
Epicenter: 58.625° N, 153.257° W
Region: Alaska
Strongest shaking: III, weak shaking
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
3.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.8	ML, local (Richter)	AACSE	Preliminary
3.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: III, weak shaking
Peak ground acceleration: 212.0% 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?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 217

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 145 in the 60 days after this one and 76 in the 30 days before it.

After

The first 60 of 145.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018dn9ud4s (also filed as ak20289675, us1000hgeb, aacse018dn9ud4s). Read Thu, Oct 1, 2026, 8:17 AM UTC.