72 km WSW of Unalaska, Alaska

Yes. A magnitude 1.9 earthquake was recorded 72 km WSW of Unalaska, Alaska, at 1:34 am AKST on 11 January 2021 (10:34 UTC), 14 km deep.

2021-01-11 10:34 UTC · 14 km deep · released about 21 lb of TNT

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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: 2021-01-11 10:34 UTC
Magnitude: M 1.9 (ml)
Depth: 14 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2114 days ago · we first saw it 2114 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 5 km (3 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
Magna, Utah 2020 M 5.7 500,000× the energy of this one
Around the size people start to feel M 3.0 45× the energy of this one
This earthquake M 1.9 about 21 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 4.7 on 2017-11-11 — about 16,000 times the energy of this one.

Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:

6.9 67 km SW of Unalaska, Alaska · 18 km SE of this epicentre Feb 27, 1987
6.8 81 km ENE of Nikolski, Alaska · 50 km SSW of this epicentre Jan 13, 1955
6.8 68 km SSW of Unalaska, Alaska · 47 km SE of this epicentre Mar 29, 1957
6.0 87 km ENE of Nikolski, Alaska · 49 km S of this epicentre May 24, 1957
6.0 51 km SW of Unalaska, Alaska · 22 km E of this epicentre Jul 19, 1986

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

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Aftershocks so far

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

1.7 86 km SSW of Unalaska, Alaska 20:02 UTC
3.6 86 km ENE of Nikolski, Alaska 17:00 UTC
1.7 46 km SW of Unalaska, Alaska 22:32 UTC
3.6 85 km WSW of Unalaska, Alaska 22:26 UTC
2.0 82 km SW of Unalaska, Alaska 01:37 UTC
3.0 91 km SW of Unalaska, Alaska 21:26 UTC
2.1 56 km SW of Unalaska, Alaska 17:13 UTC
1.6 Fox Islands, Aleutian Islands, Alaska 15:21 UTC
1.6 51 km SW of Unalaska, Alaska 12:29 UTC
1.5 78 km SW of Unalaska, Alaska 16:40 UTC
1.5 52 km SW of Unalaska, Alaska 15:17 UTC
1.5 70 km SW of Unalaska, Alaska 08:45 UTC
2.9 48 km SW of Unalaska, Alaska 14:59 UTC
2.0 66 km SW of Unalaska, Alaska 01:14 UTC
1.9 54 km SW of Unalaska, Alaska 22:54 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:07 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.