140 km SW of Nikolski, Alaska

Yes. A magnitude 2.6 earthquake was recorded 140 km SW of Nikolski, Alaska at 06:08 UTC on 2017-08-26, 33 km deep.

2017-08-26 06:08 UTC · 33 km deep · released about 240 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: 2017-08-26 06:08 UTC
Magnitude: M 2.6 (ml)
Depth: 33 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1193 days ago · we first saw it 1193 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
Magna, Utah 2020 M 5.7 45,000× the energy of this one
Around the size people start to feel M 3.0 4× the energy of this one
This earthquake M 2.6 about 240 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 5.2 on 2017-05-19 — about 7,900 times the energy of this one.

Before 2016, the USGS record lists 70 earthquakes of M5 or more within 50 km; the five largest:

6.6 135 km SW of Nikolski, Alaska · 42 km SE of this epicentre Dec 23, 1906
6.2 179 km SW of Nikolski, Alaska · 50 km S of this epicentre Jun 4, 1956
6.1 Fox Islands, Aleutian Islands, Alaska · 50 km SSW of this epicentre Jan 11, 1961
6.0 177 km WSW of Nikolski, Alaska · 46 km W of this epicentre Aug 19, 1925
6.0 128 km SW of Nikolski, Alaska · 25 km ESE of this epicentre Jun 1, 1945

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.

4.4 176 km SW of Nikolski, Alaska 16:00 UTC
2.7 147 km WSW of Nikolski, Alaska 07:35 UTC
2.8 166 km SW of Nikolski, Alaska 09:06 UTC
2.5 122 km SW of Nikolski, Alaska 20:19 UTC
4.2 Fox Islands, Aleutian Islands, Alaska 20:12 UTC
3.1 126 km SW of Nikolski, Alaska 20:11 UTC
3.2 158 km WSW of Nikolski, Alaska 08:49 UTC
3.4 128 km WSW of Nikolski, Alaska 11:53 UTC
2.5 187 km SW of Nikolski, Alaska 19:05 UTC
2.8 131 km WSW of Nikolski, Alaska 06:39 UTC
3.4 133 km SW of Nikolski, Alaska 15:28 UTC
2.6 130 km SW of Nikolski, Alaska 09:34 UTC
3.1 128 km SW of Nikolski, Alaska 08:38 UTC
4.9 130 km WSW of Nikolski, Alaska 08:16 UTC
3.8 149 km SW of Nikolski, Alaska 21:03 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 21:46 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.