Andreanof Islands, Aleutian Islands, Alaska

Yes. A magnitude 3.2 earthquake was recorded in the Andreanof Islands, Aleutian Islands, Alaska at 23:47 UTC on 2022-09-25, 29 km deep.

2022-09-25 23:47 UTC · 29 km deep · released about 1,900 lb of TNT

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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: 2022-09-25 23:47 UTC
Magnitude: M 3.2 (ml)
Depth: 29 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1441 days ago · we first saw it 1441 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 37 km (23 mi) from the epicentre. 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 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

Northridge, California 1994 M 6.7 180,000× the energy of this one
Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
Magna, Utah 2020 M 5.7 5,600× the energy of this one
This earthquake M 3.2 about 1,900 lb of TNT
Around the size people start to feel M 3.0 this one released 2× more

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 6.3 on 2016-03-12 — about 45,000 times the energy of this one.

Before 2016, the USGS record lists 128 earthquakes of M5 or more within 50 km; the five largest:

6.8 57 km SSW of Atka, Alaska · 45 km NW of this epicentre Nov 1, 1946
6.6 62 km SSE of Atka, Alaska · 28 km N of this epicentre Mar 10, 1957
6.6 89 km S of Atka, Alaska · 21 km W of this epicentre Mar 10, 1957
6.5 79 km SSE of Atka, Alaska · 34 km NE of this epicentre Mar 12, 1957
6.2 79 km SSE of Atka, Alaska · 35 km NE of this epicentre Mar 22, 1987

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

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

3.3 Andreanof Islands, Aleutian Islands, Alaska 05:44 UTC
2.2 108 km S of Atka, Alaska 05:02 UTC
2.3 95 km S of Atka, Alaska 04:56 UTC
2.7 105 km S of Atka, Alaska 03:08 UTC
3.1 93 km S of Atka, Alaska 23:09 UTC
2.1 96 km SSW of Atka, Alaska 22:17 UTC
3.8 110 km S of Atka, Alaska 20:23 UTC
3.8 Andreanof Islands, Aleutian Islands, Alaska 20:08 UTC
2.7 105 km S of Atka, Alaska 19:55 UTC
3.3 98 km S of Atka, Alaska 19:48 UTC
2.7 Andreanof Islands, Aleutian Islands, Alaska 19:47 UTC
4.3 103 km S of Atka, Alaska 19:43 UTC
4.7 Andreanof Islands, Aleutian Islands, Alaska 19:41 UTC
4.5 108 km S of Atka, Alaska 19:40 UTC
4.1 88 km S of Atka, Alaska 18:52 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:37 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.