Alaska earthquakes

M2.9 earthquake 3 km ENE of Kachemak, Alaska

A magnitude 2.9 earthquake struck 3 km ENE of Kachemak, Alaska on Tue, Aug 24, 2021, 5:36 PM AKDT (01:36 UTC), 45 km (28 mi) below the surface.

A larger quake followed: M4.7 12 km SSW of Clam Gulch, Alaska. This one was a foreshock.

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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: 2.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Aug 24, 2021, 5:36 PM AKDT
UTC: 2021-08-25 01:36:51 UTC
Depth: 45.4 km (28.2 mi), shallow
Epicenter: 59.681° N, 151.383° 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
2.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.2	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.036 · 104 stations

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: 70

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 200 in the 60 days after this one and 144 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021avz6iex (also filed as us7000f3gn). Read Thu, Oct 1, 2026, 11:12 PM UTC.