Alaska earthquakes

M3.8 earthquake 137 km E of McCarthy, Alaska

A magnitude 3.8 earthquake struck 137 km E of McCarthy, Alaska on Tue, Apr 28, 2026, 5:26 AM AKDT (13:26 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: 3.8 (Mwr, regional moment), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Apr 28, 2026, 5:26 AM AKDT
UTC: 2026-04-28 13:26:08 UTC
Depth: 5.0 km (3.1 mi), shallow
Epicenter: 61.440° N, 140.351° W
Region: Alaska
Strongest shaking: IV, light shaking
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
3.8	Mwr, regional moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.05 · 39 stations
3.8	ML, local (Richter)	Alaska Earthquake Center	Reviewed · ±0.1 · 115 stations

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: IV, light shaking
Peak ground acceleration: 3.8% of gravity
Peak ground velocity: 1.2 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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: Reverse (thrust)
Moment magnitude: 3.8 Mwr
Nodal plane 1: Strike 165°, dip 39°, rake 115°
Nodal plane 2: Strike 314°, dip 56°, rake 71°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 2.2 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 38°
Stations used: 77

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 73 in the 30 days before it.

After

The first 60 of 98.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000sgnh (also filed as aka2026ihurqf). Read Fri, Oct 2, 2026, 2:23 AM UTC.