103 km ESE of Akutan, Alaska

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 4,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
3. Magna, Utah 2020 M 5.7 130× the energy of this one
4. This earthquake M 4.3 about 43 tons of TNT
5. Around the size people start to feel M 3.0 this one released 89× 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.

Where

Epicentre 53.8514, -164.2784. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.6 75 km E of Akutan, Alaska 09:46 UTC
2. 2.0 87 km SE of Akutan, Alaska 06:34 UTC
3. 2.7 99 km SE of Akutan, Alaska 20:09 UTC
4. 2.1 102 km ESE of Akutan, Alaska 10:41 UTC
5. 2.7 72 km ESE of Akutan, Alaska 18:52 UTC
6. 2.9 117 km ESE of Akutan, Alaska 18:32 UTC
7. 2.5 109 km SSW of False Pass, Alaska 16:10 UTC
8. 3.1 103 km ESE of Akutan, Alaska 04:19 UTC
9. 2.5 84 km ESE of Akutan, Alaska 00:56 UTC
10. 2.1 83 km SSW of False Pass, Alaska 18:41 UTC
11. 2.7 88 km SSW of False Pass, Alaska 14:44 UTC
12. 2.2 95 km ESE of Akutan, Alaska 09:08 UTC
13. 2.5 108 km ESE of Akutan, Alaska 08:36 UTC
14. 2.1 105 km ESE of Akutan, Alaska 17:26 UTC
15. 2.1 103 km SSW of False Pass, Alaska 05:18 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:42 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2021-01-11 — it released about 16 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.