Alaska earthquakes

M3.4 earthquake 92 km WSW of Karluk, Alaska

A magnitude 3.4 earthquake struck 92 km WSW of Karluk, Alaska on Wed, Aug 15, 2018, 3:40 AM AKDT (11:40 UTC), 56 km (35 mi) below the surface.

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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: 3.4 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Wed, Aug 15, 2018, 3:40 AM AKDT
UTC: 2018-08-15 11:40:18 UTC
Depth: 56.3 km (35.0 mi), shallow
Epicenter: 57.133° N, 155.755° 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
3.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.4	ML, local (Richter)	AACSE	Preliminary
3.4	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: 138

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 100 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018afls5tq (also filed as ak20104439, us1000g9lv, aacse018afls5tq). Read Fri, Oct 2, 2026, 1:24 PM UTC.