Rat Islands, Aleutian Islands, Alaska

Yes. A magnitude 2.2 earthquake was recorded in the Rat Islands, Aleutian Islands, Alaska at 04:55 UTC on 2026-10-18, 90 km deep.

2026-10-18 04:55 UTC · 90 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area

Distance rings around the epicentre, with the nearest towns at their true direction. Not a shaking map — see the USGS ShakeMap for that.

When: 2026-10-18 04:55 UTC
Magnitude: M 2.2 (ml)
Depth: 90 km below the surface
Felt: no reports yet
Nearest: Aleutians West Census Area, 57 km ENE
Status: Reviewed by a seismologist

USGS · last changed by USGS 33 hours ago · we first saw it 33 hours ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
Magna, Utah 2020 M 5.7 180,000× the energy of this one
Around the size people start to feel M 3.0 16× the energy of this one
This earthquake M 2.2 about 60 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.4 on 2026-10-11 — about 2,000 times the energy of this one.

Before 2016, the USGS record lists 59 earthquakes of M5 or more within 50 km; the five largest:

7.9 Rat Islands, Aleutian Islands, Alaska · 21 km NNW of this epicentre Jun 23, 2014
6.7 275 km WSW of Adak, Alaska · 48 km SE of this epicentre Apr 26, 1930
6.6 276 km WSW of Adak, Alaska · 47 km SE of this epicentre Mar 27, 1940
6.6 283 km WSW of Adak, Alaska · 49 km SE of this epicentre Oct 29, 1958
6.5 280 km W of Adak, Alaska · 36 km ESE of this epicentre May 20, 1930

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Map loads when it scrolls into view

Nearby places

Place	Distance	Direction from the epicentre
Aleutians West Census Area, AK	57 km (36 mi)	ENE	earthquakes near Aleutians West Census Area

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

No further earthquakes have been recorded within 50 km since this one.

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:34 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.