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
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

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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.