147 km S of Adak, Alaska

Yes. A magnitude 2.3 earthquake was recorded 147 km S of Adak, Alaska at 01:52 UTC on 2022-01-01, 26 km deep.

2022-01-01 01:52 UTC · 26 km deep · released about 85 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: 2022-01-01 01:52 UTC
Magnitude: M 2.3 (ml)
Depth: 26 km below the surface
Felt: no reports yet
Nearest mapped fault: Alaska-Aleutian subduction zone, 12 km from its surface trace — near is not the same as on
Status: Reviewed by a seismologist

USGS · last changed by USGS 1750 days ago · we first saw it 1750 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
Magna, Utah 2020 M 5.7 130,000× the energy of this one
Around the size people start to feel M 3.0 11× the energy of this one
This earthquake M 2.3 about 85 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 45,000 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

6.4 146 km S of Adak, Alaska · 3 km ENE of this epicentre Mar 10, 1957
6.1 189 km S of Adak, Alaska · 42 km SSW of this epicentre Jul 3, 1960
6.0 161 km SSW of Adak, Alaska · 48 km W of this epicentre Jan 11, 1934
6.0 136 km S of Adak, Alaska · 13 km NNW of this epicentre Mar 11, 1957
5.8 176 km S of Adak, Alaska · 29 km S of this epicentre Apr 10, 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

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

3.5 167 km SSW of Adak, Alaska 13:16 UTC
2.4 150 km S of Adak, Alaska 07:14 UTC
2.2 116 km S of Adak, Alaska 22:33 UTC
2.8 170 km S of Adak, Alaska 13:48 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
2.1 113 km SSW of Adak, Alaska 15:44 UTC
3.8 175 km S of Adak, Alaska 05:13 UTC
2.2 183 km SSW of Adak, Alaska 13:17 UTC
2.1 114 km S of Adak, Alaska 04:04 UTC
2.9 189 km S of Adak, Alaska 00:36 UTC
3.3 145 km SSW of Adak, Alaska 07:30 UTC
2.8 171 km S of Adak, Alaska 01:25 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 20:54 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.