101 km ESE of Nikolski, Alaska

Yes. A magnitude 4.3 earthquake was recorded 101 km ESE of Nikolski, Alaska at 23:43 UTC on 2016-01-14, 18 km deep.

2016-01-14 23:43 UTC · 18 km deep · released about 43 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: 2016-01-14 23:43 UTC
Magnitude: M 4.3 (mb)
Depth: 18 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1205 days ago · we first saw it 1205 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 120 km (75 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 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

Northridge, California 1994 M 6.7 4,000× the energy of this one
Mineral, Virginia 2011 M 5.8 180× the energy of this one
Magna, Utah 2020 M 5.7 130× the energy of this one
This earthquake M 4.3 about 43 tons of TNT
Around the size people start to feel M 3.0 this one released 89× 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

Tied for the largest within 50 km (31 mi) since 2016, with M 4.3 on 2016-01-06.

Before 2016, the USGS record lists 72 earthquakes of M5 or more within 50 km; the five largest:

7.0 Fox Islands, Aleutian Islands, Alaska · 15 km SSE of this epicentre Jan 1, 1902
6.7 103 km SE of Nikolski, Alaska · 13 km SSW of this epicentre Feb 20, 1916
6.7 72 km ESE of Nikolski, Alaska · 30 km NW of this epicentre Jan 2, 1957
6.6 61 km SE of Nikolski, Alaska · 41 km WNW of this epicentre Jan 2, 1957
6.5 127 km E of Nikolski, Alaska · 47 km NE of this epicentre Oct 13, 2009

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

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

2.0 78 km E of Nikolski, Alaska 22:12 UTC
1.7 113 km ESE of Nikolski, Alaska 16:08 UTC
2.3 105 km SE of Nikolski, Alaska 04:36 UTC
1.9 113 km E of Nikolski, Alaska 20:37 UTC
2.0 88 km SE of Nikolski, Alaska 14:40 UTC
2.5 91 km SE of Nikolski, Alaska 14:10 UTC
2.1 124 km ESE of Nikolski, Alaska 04:39 UTC
2.1 129 km ESE of Nikolski, Alaska 12:53 UTC
2.2 132 km ESE of Nikolski, Alaska 12:44 UTC
3.2 Fox Islands, Aleutian Islands, Alaska 10:59 UTC
1.7 89 km ESE of Nikolski, Alaska 09:25 UTC
3.1 85 km SE of Nikolski, Alaska 17:17 UTC
1.6 77 km E of Nikolski, Alaska 16:02 UTC
1.7 91 km E of Nikolski, Alaska 05:59 UTC
2.0 95 km SE of Nikolski, Alaska 17:46 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 09:20 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.