139 km SW of Adak, Alaska

Yes. A magnitude 2.9 earthquake was recorded 139 km SW of Adak, Alaska at 06:17 UTC on 2019-01-12, 35 km deep.

2019-01-12 06:17 UTC · 35 km deep · released about 680 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: 2019-01-12 06:17 UTC
Magnitude: M 2.9 (ml)
Depth: 35 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2782 days ago · we first saw it 2782 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
Magna, Utah 2020 M 5.7 16,000× the energy of this one
Around the size people start to feel M 3.0 1.4× the energy of this one
This earthquake M 2.9 about 680 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 6.5 on 2018-08-15 — about 250,000 times the energy of this one.

Before 2016, the USGS record lists 194 earthquakes of M5 or more within 50 km; the five largest:

7.0 114 km WSW of Adak, Alaska · 38 km N of this epicentre Jul 5, 1929
7.0 148 km WSW of Adak, Alaska · 36 km NW of this epicentre Mar 11, 1957
6.9 151 km WSW of Adak, Alaska · 42 km NW of this epicentre May 15, 1993
6.8 111 km SW of Adak, Alaska · 27 km NE of this epicentre Jan 4, 1912
6.6 152 km WSW of Adak, Alaska · 48 km NW of this epicentre Mar 13, 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

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

2.6 136 km WSW of Adak, Alaska 05:33 UTC
2.1 125 km WSW of Adak, Alaska 00:42 UTC
3.0 132 km WSW of Adak, Alaska 21:06 UTC
4.8 130 km WSW of Adak, Alaska 20:25 UTC
2.9 100 km SW of Adak, Alaska 12:26 UTC
2.6 128 km WSW of Adak, Alaska 12:21 UTC
2.8 141 km SW of Adak, Alaska 10:55 UTC
2.4 125 km SW of Adak, Alaska 03:55 UTC
2.2 Andreanof Islands, Aleutian Islands, Alaska 20:13 UTC
2.3 120 km WSW of Adak, Alaska 12:09 UTC
2.4 123 km WSW of Adak, Alaska 19:29 UTC
2.4 126 km WSW of Adak, Alaska 16:58 UTC
4.1 140 km WSW of Adak, Alaska 16:25 UTC
2.2 133 km SW of Adak, Alaska 07:09 UTC
2.7 126 km WSW of Adak, Alaska 15:17 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:50 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.