66 km ENE of Adak, Alaska

Yes. A magnitude 3.1 earthquake was recorded 66 km ENE of Adak, Alaska at 04:48 UTC on 2022-06-30, 106 km deep.

2022-06-30 04:48 UTC · 106 km deep · released about 1,300 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: 2022-06-30 04:48 UTC
Magnitude: M 3.1 (ml)
Depth: 106 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1532 days ago · we first saw it 1532 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 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

Northridge, California 1994 M 6.7 250,000× the energy of this one
Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
Magna, Utah 2020 M 5.7 7,900× the energy of this one
This earthquake M 3.1 about 1,300 lb of TNT
Around the size people start to feel M 3.0 this one released 1.4× 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 5.3 on 2017-05-28 — about 2,000 times the energy of this one.

Before 2016, the USGS record lists 78 earthquakes of M5 or more within 50 km; the five largest:

6.7 52 km ESE of Adak, Alaska · 43 km SSW of this epicentre Nov 4, 1977
6.5 56 km E of Adak, Alaska · 18 km SSW of this epicentre Jul 17, 1914
6.5 46 km ESE of Adak, Alaska · 32 km SW of this epicentre Jan 5, 1961
6.4 89 km ESE of Adak, Alaska · 49 km SSE of this epicentre Nov 6, 1973
6.3 52 km ENE of Adak, Alaska · 14 km W of this epicentre Nov 2, 1933

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.

1.8 80 km ENE of Adak, Alaska 01:04 UTC
2.0 54 km ESE of Adak, Alaska 17:17 UTC
2.6 61 km ESE of Adak, Alaska 09:18 UTC
3.1 74 km ENE of Adak, Alaska 09:41 UTC
1.8 80 km E of Adak, Alaska 00:43 UTC
2.6 50 km E of Adak, Alaska 14:14 UTC
1.6 43 km SE of Adak, Alaska 03:18 UTC
2.9 Andreanof Islands, Aleutian Islands, Alaska 04:11 UTC
1.7 44 km ENE of Adak, Alaska 15:01 UTC
2.0 69 km NE of Adak, Alaska 04:30 UTC
1.6 39 km E of Adak, Alaska 04:01 UTC
3.4 56 km ENE of Adak, Alaska 01:01 UTC
2.0 69 km ENE of Adak, Alaska 23:54 UTC
2.5 72 km E of Adak, Alaska 05:59 UTC
1.5 51 km ENE of Adak, Alaska 07:31 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 05:14 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.