Alaska earthquakes

M3.4 earthquake 84 km SSW of Cordova, Alaska

A magnitude 3.4 earthquake struck 84 km SSW of Cordova, Alaska on Thu, Feb 18, 2021, 6:18 AM AKST (15:18 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.6 54 km S of Chenega, Alaska. This one was a foreshock.

Cordova forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 3.4 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Thu, Feb 18, 2021, 6:18 AM AKST
UTC: 2021-02-18 15:18:38 UTC
Depth: 15.7 km (9.8 mi), shallow
Epicenter: 59.885° N, 146.530° 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
3.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.4	mb, body-wave	USGS National Earthquake Information Center	Reviewed · ±0.488 · 1 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: 216

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 22 in the 60 days after this one and 21 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak02129adg6n (also filed as us6000dinz). Read Fri, Oct 2, 2026, 11:39 PM UTC.