186 km E of Atka, Alaska

Yes. A magnitude 2.7 earthquake was recorded 186 km E of Atka, Alaska at 05:17 UTC on 2020-10-12, 35 km deep.

2020-10-12 05:17 UTC · 35 km deep · released about 340 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: 2020-10-12 05:17 UTC
Magnitude: M 2.7 (ml)
Depth: 35 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2156 days ago · we first saw it 2156 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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
Magna, Utah 2020 M 5.7 32,000× the energy of this one
Around the size people start to feel M 3.0 2.8× the energy of this one
This earthquake M 2.7 about 340 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 5.9 on 2018-08-25 — about 63,000 times the energy of this one.

Before 2016, the USGS record lists 61 earthquakes of M5 or more within 50 km; the five largest:

7.3 Fox Islands, Aleutian Islands, Alaska · 24 km WNW of this epicentre Jun 24, 2011
6.9 170 km E of Atka, Alaska · 25 km NW of this epicentre Sep 2, 2011
6.3 143 km E of Atka, Alaska · 44 km W of this epicentre Apr 5, 1957
6.1 185 km ESE of Atka, Alaska · 15 km SSW of this epicentre Dec 6, 1930
6.1 207 km ESE of Atka, Alaska · 39 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

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

2.2 173 km ESE of Atka, Alaska 12:17 UTC
2.1 176 km ESE of Atka, Alaska 06:28 UTC
3.3 184 km SW of Nikolski, Alaska 23:25 UTC
2.3 170 km E of Atka, Alaska 10:57 UTC
3.0 201 km ESE of Atka, Alaska 23:16 UTC
3.1 165 km WSW of Nikolski, Alaska 22:04 UTC
2.2 179 km E of Atka, Alaska 07:35 UTC
3.6 185 km SW of Nikolski, Alaska 17:47 UTC
3.2 194 km WSW of Nikolski, Alaska 20:01 UTC
2.7 195 km WSW of Nikolski, Alaska 03:44 UTC
2.5 174 km E of Atka, Alaska 06:13 UTC
3.1 173 km WSW of Nikolski, Alaska 17:29 UTC
3.4 206 km ESE of Atka, Alaska 17:14 UTC
2.8 191 km ESE of Atka, Alaska 01:21 UTC
2.9 193 km E of Atka, Alaska 10:39 UTC

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