Andreanof Islands, Aleutian Islands, Alaska

Yes. A magnitude 2.2 earthquake was recorded in the Andreanof Islands, Aleutian Islands, Alaska at 19:14 UTC on 2022-02-04, 25 km deep.

2022-02-04 19:14 UTC · 25 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 and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 2022-02-04 19:14 UTC
Magnitude: M 2.2 (ml)
Depth: 25 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1724 days ago · we first saw it 1724 days 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 5.4 on 2019-09-09 — about 63,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

6.5 184 km SSW of Adak, Alaska · 39 km WNW of this epicentre Aug 15, 2007
6.4 146 km S of Adak, Alaska · 44 km NNE of this epicentre Mar 10, 1957
6.2 204 km S of Adak, Alaska · 25 km SE of this epicentre Dec 9, 1918
6.1 198 km S of Adak, Alaska · 14 km SE of this epicentre May 22, 1957
6.1 189 km S of Adak, Alaska · 1 km E of this epicentre Jul 3, 1960

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

Aftershocks so far

56 earthquakes have been recorded within 50 km since this one.

2.4 147 km S of Adak, Alaska 06:07 UTC
2.7 191 km S of Adak, Alaska 18:21 UTC
3.3 159 km SSW of Adak, Alaska 12:15 UTC
3.5 167 km SSW of Adak, Alaska 13:16 UTC
2.4 150 km S of Adak, Alaska 07:14 UTC
2.4 205 km S of Adak, Alaska 06:22 UTC
2.1 178 km S of Adak, Alaska 18:24 UTC
3.0 174 km S of Adak, Alaska 08:14 UTC
2.2 188 km S of Adak, Alaska 13:30 UTC
2.2 158 km S of Adak, Alaska 11:00 UTC
3.8 175 km S of Adak, Alaska 05:13 UTC
2.2 183 km SSW of Adak, Alaska 13:17 UTC
3.0 202 km S of Adak, Alaska 12:25 UTC
2.8 172 km SSW of Adak, Alaska 13:18 UTC
2.9 189 km S of Adak, Alaska 00:36 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 20:22 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.