118 km SE of Atka, Alaska

Yes. A magnitude 3.0 earthquake was recorded 118 km SE of Atka, Alaska at 05:48 UTC on 2019-07-24, 35 km deep.

2019-07-24 05:48 UTC · 35 km deep · released about 950 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: 2019-07-24 05:48 UTC
Magnitude: M 3.0 (ml)
Depth: 35 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2590 days ago · we first saw it 2590 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 11 km (7 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

Northridge, California 1994 M 6.7 350,000× the energy of this one
Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
Magna, Utah 2020 M 5.7 11,000× the energy of this one
This earthquake M 3.0 about 950 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 5.4 on 2017-06-17 — about 4,000 times the energy of this one.

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

6.5 95 km ESE of Atka, Alaska · 34 km N of this epicentre Mar 10, 1957
6.5 79 km SSE of Atka, Alaska · 44 km WNW of this epicentre Mar 12, 1957
6.5 99 km SE of Atka, Alaska · 24 km N of this epicentre Nov 9, 2015
6.2 79 km SSE of Atka, Alaska · 43 km WNW of this epicentre Mar 22, 1987
6.1 108 km SE of Atka, Alaska · 26 km NNE of this epicentre May 1, 1933

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

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

3.6 103 km SE of Atka, Alaska 03:16 UTC
2.9 106 km ESE of Atka, Alaska 20:44 UTC
3.3 112 km SE of Atka, Alaska 06:50 UTC
3.0 90 km SSE of Atka, Alaska 14:03 UTC
2.8 92 km SE of Atka, Alaska 03:48 UTC
1.7 75 km SE of Atka, Alaska 01:07 UTC
3.3 85 km SE of Atka, Alaska 13:47 UTC
2.9 116 km ESE of Atka, Alaska 22:02 UTC
1.8 85 km SE of Atka, Alaska 00:56 UTC
1.9 129 km SE of Atka, Alaska 03:24 UTC
1.8 69 km SE of Atka, Alaska 01:34 UTC
2.6 123 km ESE of Atka, Alaska 01:33 UTC
1.9 83 km SSE of Atka, Alaska 07:41 UTC
3.3 87 km SE of Atka, Alaska 17:52 UTC
2.8 121 km SE of Atka, Alaska 16:13 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:44 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.