58 km WSW of False Pass, Alaska

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 8 km (5 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 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
3. Around the size people start to feel M 3.0 130× the energy of this one
4. This earthquake M 1.6 about 7.3 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 4.9 on 2017-05-12 — about 92,000 times the energy of this one.

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

1. 6.5 79 km SW of False Pass, Alaska · 37 km S of this epicentre Nov 19, 1993
2. 5.9 27 km W of False Pass, Alaska · 38 km NE of this epicentre Oct 1, 1951
3. 5.8 85 km SW of False Pass, Alaska · 44 km S of this epicentre Jan 3, 1998
4. 5.6 87 km SSW of False Pass, Alaska · 48 km S of this epicentre Dec 27, 1983
5. 5.6 52 km SSW of False Pass, Alaska · 29 km SE of this epicentre Jun 4, 2004

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

Epicentre 54.6168, -164.2222. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 1.0 24 km WSW of False Pass, Alaska 19:19 UTC
2. 1.3 59 km WSW of False Pass, Alaska 04:56 UTC
3. 1.1 31 km WSW of False Pass, Alaska 18:57 UTC
4. 1.1 85 km NE of Akutan, Alaska 07:14 UTC
5. 1.7 60 km WSW of False Pass, Alaska 23:23 UTC
6. 2.4 29 km WSW of False Pass, Alaska 08:44 UTC
7. 2.2 59 km WSW of False Pass, Alaska 22:54 UTC
8. 3.7 35 km SW of False Pass, Alaska 16:34 UTC
9. 1.8 58 km WSW of False Pass, Alaska 19:25 UTC
10. 2.5 60 km SSW of False Pass, Alaska 06:17 UTC
11. 0.6 85 km ENE of Akutan, Alaska 05:38 UTC
12. 1.4 28 km SW of False Pass, Alaska 23:59 UTC
13. 1.4 56 km WSW of False Pass, Alaska 17:36 UTC
14. 1.2 38 km WSW of False Pass, Alaska 08:55 UTC
15. 2.5 22 km WNW of False Pass, Alaska 09:53 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:22 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.