127 km SE of Chignik, Alaska

Yes. A magnitude 3.1 earthquake was recorded 127 km SE of Chignik, Alaska at 04:37 UTC on 2022-01-23, 6.0 km deep.

2022-01-23 04:37 UTC · 6.0 km deep · released about 1,300 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: 2022-01-23 04:37 UTC
Magnitude: M 3.1 (ml)
Depth: 6.0 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 1679 days ago · we first saw it 1679 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, people at rest would likely notice it out to about 41 km (25 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

Northridge, California 1994 M 6.7 250,000× the energy of this one
Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
Magna, Utah 2020 M 5.7 7,900× the energy of this one
This earthquake M 3.1 about 1,300 lb of TNT
Around the size people start to feel M 3.0 this one released 1.4× 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 2021-07-29 — about 16,000 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

7.0 113 km ESE of Chignik, Alaska · 41 km NNE of this epicentre May 4, 1923
7.0 164 km SE of Chignik, Alaska · 38 km ESE of this epicentre Sep 4, 1989
6.7 121 km SE of Chignik, Alaska · 14 km WSW of this epicentre Feb 13, 1979
6.6 128 km SE of Chignik, Alaska · 21 km NE of this epicentre Jul 28, 1934
6.0 168 km SE of Chignik, Alaska · 40 km SE of this epicentre Nov 16, 1938

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.

3.1 175 km SE of Chignik, Alaska 01:13 UTC
2.7 152 km SE of Chignik, Alaska 04:21 UTC
2.1 105 km SE of Chignik, Alaska 16:00 UTC
3.3 110 km SE of Chignik, Alaska 12:06 UTC
2.2 Alaska Peninsula 16:59 UTC
2.5 156 km SE of Chignik, Alaska 02:05 UTC
2.1 140 km SE of Chignik, Alaska 15:07 UTC
2.1 136 km SSE of Chignik, Alaska 17:45 UTC
3.2 south of Alaska 02:00 UTC
2.4 134 km SE of Chignik, Alaska 18:35 UTC
2.4 138 km SSE of Chignik, Alaska 12:38 UTC
4.4 119 km SE of Chignik, Alaska 13:23 UTC
2.5 142 km SE of Chignik, Alaska 23:26 UTC
2.7 138 km SE of Chignik, Alaska 10:39 UTC
1.9 109 km SE of Chignik, Alaska 14:59 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:02 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.