174 km ENE of Atka, Alaska

Yes. A magnitude 3.2 earthquake was recorded 174 km ENE of Atka, Alaska at 23:27 UTC on 2026-05-18, 10 km deep.

2026-05-18 23:27 UTC · 10 km deep · released about 1,900 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: 2026-05-18 23:27 UTC
Magnitude: M 3.2 (ml)
Depth: 10 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 111 days ago · we first saw it 111 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 45 km (28 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 5.6 on 2023-10-12 — about 4,000 times the energy of this one.

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

6.9 170 km E of Atka, Alaska · 42 km S of this epicentre Sep 2, 2011
6.8 167 km W of Nikolski, Alaska · 48 km NNE of this epicentre Feb 21, 1957
6.2 173 km WSW of Nikolski, Alaska · 23 km ENE of this epicentre Jan 14, 1968
6.1 188 km E of Atka, Alaska · 38 km SSE of this epicentre Jan 4, 1968
6.0 177 km WSW of Nikolski, Alaska · 44 km SE of this epicentre Aug 19, 1925

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

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

3.1 145 km ENE of Atka, Alaska 15:01 UTC
3.2 166 km WSW of Nikolski, Alaska 23:07 UTC
3.8 166 km W of Nikolski, Alaska 14:46 UTC
4.1 173 km W of Nikolski, Alaska 14:39 UTC
3.5 163 km W of Nikolski, Alaska 14:34 UTC
6.5 177 km W of Nikolski, Alaska 14:19 UTC
3.9 167 km WSW of Nikolski, Alaska 08:28 UTC
2.9 178 km E of Atka, Alaska 09:03 UTC
2.9 171 km ENE of Atka, Alaska 05:54 UTC
2.9 175 km E of Atka, Alaska 04:31 UTC
3.1 173 km E of Atka, Alaska 04:13 UTC
2.5 176 km E of Atka, Alaska 07:30 UTC
2.9 176 km E of Atka, Alaska 05:40 UTC
2.7 172 km E of Atka, Alaska 10:59 UTC
2.8 181 km E of Atka, Alaska 15:40 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 05:54 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.