132 km E of Atka, Alaska

Yes. A magnitude 2.2 earthquake was recorded 132 km E of Atka, Alaska at 19:06 UTC on 2025-08-23, 59 km deep.

2025-08-23 19:06 UTC · 59 km deep · released about 60 lb of TNT

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: 2025-08-23 19:06 UTC
Magnitude: M 2.2 (ml)
Depth: 59 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 380 days ago · we first saw it 380 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 5.0 on 2023-11-03 — about 16,000 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

7.3 Fox Islands, Aleutian Islands, Alaska · 36 km SE of this epicentre Jun 24, 2011
6.9 170 km E of Atka, Alaska · 38 km E of this epicentre Sep 2, 2011
6.3 143 km E of Atka, Alaska · 27 km SSE of this epicentre Apr 5, 1957
6.1 157 km ESE of Atka, Alaska · 46 km SSE of this epicentre Jul 13, 1959
6.0 182 km E of Atka, Alaska · 50 km E of this epicentre Mar 24, 1957

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

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

3.1 120 km ESE of Atka, Alaska 03:12 UTC
3.1 145 km ENE of Atka, Alaska 15:01 UTC
3.0 117 km ESE of Atka, Alaska 10:49 UTC
3.4 106 km E of Atka, Alaska 05:05 UTC
2.9 119 km ESE of Atka, Alaska 07:43 UTC
3.6 130 km E of Atka, Alaska 07:54 UTC
2.6 150 km E of Atka, Alaska 20:46 UTC
3.3 136 km ESE of Atka, Alaska 18:08 UTC
3.8 138 km E of Atka, Alaska 14:35 UTC
3.2 114 km ESE of Atka, Alaska 02:31 UTC
3.4 169 km E of Atka, Alaska 15:37 UTC
2.8 104 km E of Atka, Alaska 09:38 UTC
3.9 170 km E of Atka, Alaska 20:15 UTC
4.4 171 km E of Atka, Alaska 20:10 UTC
4.4 167 km E of Atka, Alaska 12:46 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 05:50 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.