180 km E of Atka, Alaska

Yes. A magnitude 4.4 earthquake was recorded 180 km E of Atka, Alaska at 21:50 UTC on 2019-02-06, 53 km deep.

2019-02-06 21:50 UTC · 53 km deep · released about 60 tons 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: 2019-02-06 21:50 UTC
Magnitude: M 4.4 (mb)
Depth: 53 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2760 days ago · we first saw it 2760 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 119 km (74 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 60 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

Northridge, California 1994 M 6.7 2,800× the energy of this one
Mineral, Virginia 2011 M 5.8 130× the energy of this one
Magna, Utah 2020 M 5.7 89× the energy of this one
This earthquake M 4.4 about 60 tons of TNT
Around the size people start to feel M 3.0 this one released 130× 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 5.9 on 2018-08-25 — about 180 times the energy of this one.

Before 2016, the USGS record lists 58 earthquakes of M5 or more within 50 km; the five largest:

7.3 Fox Islands, Aleutian Islands, Alaska · 18 km W of this epicentre Jun 24, 2011
6.9 170 km E of Atka, Alaska · 15 km NW of this epicentre Sep 2, 2011
6.3 143 km E of Atka, Alaska · 38 km W of this epicentre Apr 5, 1957
6.1 185 km ESE of Atka, Alaska · 23 km S of this epicentre Dec 6, 1930
6.1 207 km ESE of Atka, Alaska · 49 km SSE 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.

2.4 180 km WSW of Nikolski, Alaska 23:09 UTC
3.3 188 km SW of Nikolski, Alaska 16:38 UTC
3.6 147 km E of Atka, Alaska 14:46 UTC
2.7 178 km WSW of Nikolski, Alaska 01:38 UTC
4.1 147 km E of Atka, Alaska 18:28 UTC
2.9 179 km WSW of Nikolski, Alaska 17:39 UTC
2.5 192 km ESE of Atka, Alaska 10:37 UTC
3.4 183 km WSW of Nikolski, Alaska 13:05 UTC
3.0 191 km E of Atka, Alaska 08:39 UTC
2.7 186 km E of Atka, Alaska 05:17 UTC
3.0 193 km WSW of Nikolski, Alaska 02:45 UTC
3.0 194 km ESE of Atka, Alaska 11:10 UTC
3.0 209 km SW of Nikolski, Alaska 03:13 UTC
3.8 183 km ESE of Atka, Alaska 13:25 UTC
3.4 200 km SW of Nikolski, Alaska 11:22 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 09:23 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.