Alaska earthquakes

M4.7 earthquake 295 km WSW of Adak, Alaska

A magnitude 4.7 earthquake struck 295 km WSW of Adak, Alaska on Sat, May 9, 2026, 8:03 AM GMT+12 (20:03 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M6.1 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 4.7 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Sat, May 9, 2026, 8:03 AM GMT+12
UTC: 2026-05-08 20:03:25 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.009° N, 179.347° E
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
4.7	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.034 · 260 stations
5.0	ML, local (Richter)	Alaska Earthquake Center	Preliminary · ±0.1 · 35 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: 2.8% 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.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.8 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.03
Depth from: Operator assigned
Station coverage gap: 176°
Stations used: 134

Nearby

Within 100 km, magnitude 1.7 and up: 100 in the 60 days after this one and 23 in the 30 days before it.

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000swbu (also filed as aka2026jccxpm). Read Thu, Oct 1, 2026, 11:23 AM UTC.