170 km ESE of Chignik, Alaska

Yes. A magnitude 2.3 earthquake was recorded 170 km ESE of Chignik, Alaska at 05:41 UTC on 2024-03-26, 19 km deep.

2024-03-26 05:41 UTC · 19 km deep · released about 85 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: 2024-03-26 05:41 UTC
Magnitude: M 2.3 (ml)
Depth: 19 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 943 days ago · we first saw it 943 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 6 km (4 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
Magna, Utah 2020 M 5.7 130,000× the energy of this one
Around the size people start to feel M 3.0 11× the energy of this one
This earthquake M 2.3 about 85 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 4.8 on 2021-07-29 — about 5,600 times the energy of this one.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

7.0 164 km SE of Chignik, Alaska · 43 km SW of this epicentre Sep 4, 1989
6.9 143 km ESE of Chignik, Alaska · 29 km NW of this epicentre Feb 13, 1951
6.9 171 km SW of Akhiok, Alaska · 15 km NNE of this epicentre Feb 6, 1964
6.6 128 km SE of Chignik, Alaska · 47 km W of this epicentre Jul 28, 1934
5.9 169 km ESE of Chignik, Alaska · 1 km NW of this epicentre Feb 6, 1964

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.

2.5 160 km ESE of Chignik, Alaska 22:33 UTC
2.1 128 km ESE of Chignik, Alaska 13:55 UTC
2.3 136 km ESE of Chignik, Alaska 15:19 UTC
3.4 209 km SSW of Akhiok, Alaska 04:58 UTC
2.4 168 km ESE of Chignik, Alaska 21:34 UTC
2.7 183 km SSW of Akhiok, Alaska 03:07 UTC
3.0 183 km SSW of Akhiok, Alaska 02:19 UTC
2.3 160 km ESE of Chignik, Alaska 14:09 UTC
2.5 142 km ESE of Chignik, Alaska 13:46 UTC
2.4 156 km SSW of Akhiok, Alaska 09:56 UTC
2.6 167 km ESE of Chignik, Alaska 21:28 UTC
2.7 139 km ESE of Chignik, Alaska 04:48 UTC
3.1 150 km SW of Akhiok, Alaska 16:53 UTC
2.4 134 km ESE of Chignik, Alaska 17:42 UTC
2.5 147 km ESE of Chignik, Alaska 17:30 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 03:51 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.