Alaska earthquakes

M2.5 earthquake Alaska Peninsula

A magnitude 2.5 earthquake struck in the Alaska Peninsula on Fri, Aug 4, 2017, 5:52 AM AKDT (13:52 UTC), 129 km (80 mi) below the surface.

A larger quake followed: M5.6 61 km NW of Aleneva, Alaska. This one was a foreshock.

Naknek 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: 2.5 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Fri, Aug 4, 2017, 5:52 AM AKDT
UTC: 2017-08-04 13:52:19 UTC
Depth: 128.9 km (80.1 mi), intermediate-depth
Epicenter: 58.883° N, 154.533° W
Region: Alaska
Felt reports: 1
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
2.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Stations used: 64

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 130 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of 130.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0179xg4sa3 (also filed as ak16433387, us2000a4hx). Read Sun, Oct 4, 2026, 10:23 AM UTC.