148 km ESE of Chignik, Alaska

Yes. A magnitude 2.6 earthquake was recorded 148 km ESE of Chignik, Alaska at 11:37 UTC on 2024-04-26, 37 km deep.

2024-04-26 11:37 UTC · 37 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: 2024-04-26 11:37 UTC
Magnitude: M 2.6 (ml)
Depth: 37 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 863 days ago · we first saw it 863 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 6.9 on 2021-10-11 — about 2,800,000 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

7.0 113 km ESE of Chignik, Alaska · 47 km WSW of this epicentre May 4, 1923
6.9 143 km ESE of Chignik, Alaska · 25 km SSW of this epicentre Feb 13, 1951
6.9 171 km SW of Akhiok, Alaska · 33 km SSE of this epicentre Feb 6, 1964
6.3 112 km E of Chignik, Alaska · 40 km WNW of this epicentre Feb 25, 1953
6.1 132 km E of Chignik, Alaska · 26 km NNW of this epicentre Sep 13, 1911

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

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

2.4 132 km ESE of Chignik, Alaska 04:31 UTC
2.1 135 km SW of Akhiok, Alaska 13:25 UTC
2.8 129 km ESE of Chignik, Alaska 17:27 UTC
1.8 159 km SSW of Akhiok, Alaska 16:10 UTC
1.7 142 km ESE of Chignik, Alaska 03:40 UTC
1.8 172 km SW of Akhiok, Alaska 10:37 UTC
2.2 112 km E of Chignik, Alaska 05:10 UTC
2.2 127 km WSW of Akhiok, Alaska 02:51 UTC
2.0 114 km WSW of Akhiok, Alaska 11:16 UTC
3.1 115 km E of Chignik, Alaska 14:58 UTC
1.9 151 km SW of Akhiok, Alaska 02:50 UTC
2.2 110 km E of Chignik, Alaska 10:40 UTC
2.2 129 km SW of Akhiok, Alaska 12:51 UTC
2.8 134 km ESE of Chignik, Alaska 10:54 UTC
2.3 133 km E of Chignik, Alaska 11:29 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:11 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.