Alaska earthquakes

M4.9 earthquake 126 km E of McCarthy, Alaska

A magnitude 4.9 earthquake struck 126 km E of McCarthy, Alaska on Sat, May 8, 2021, 6:03 PM AKDT (02:03 UTC), 5 km (3 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: 4.9 (mww), light
Local time: Sat, May 8, 2021, 6:03 PM AKDT
UTC: 2021-05-09 02:03:46 UTC
Depth: 5.1 km (3.2 mi), shallow
Epicenter: 61.506° N, 140.544° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique reverse
Moment magnitude: 4.9 Mww
Nodal plane 1: Strike 81°, dip 34°, rake 48°
Nodal plane 2: Strike 308°, dip 65°, rake 115°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.1 km horizontally, 3.4 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 31°
Stations used: 120

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 11 in the 60 days after this one and 1 in the 30 days before it.

After

Before

2.3146 km WNW of Haines Junction, CanadaFri, Apr 9, 6:04 AM AKDT · 1998 days ago · 1 km deep · 45 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e1gi (also filed as ak0215xdjdm1). Read Mon, Sep 28, 2026, 6:35 AM UTC.