110 km ESE of Yakutat, Alaska

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
2. Magna, Utah 2020 M 5.7 350,000× the energy of this one
3. Around the size people start to feel M 3.0 32× the energy of this one
4. This earthquake M 2.0 about 30 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.

Where

Epicentre 59.0278, -138.0779. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.3 113 km ESE of Yakutat, Alaska 06:08 UTC
2. 2.3 116 km WSW of Covenant Life, Alaska 13:48 UTC
3. 2.5 113 km WSW of Covenant Life, Alaska 17:24 UTC
4. 2.0 97 km NW of Elfin Cove, Alaska 18:13 UTC
5. 1.7 95 km NW of Elfin Cove, Alaska 10:50 UTC
6. 2.2 100 km WNW of Elfin Cove, Alaska 07:40 UTC
7. 1.5 104 km WSW of Covenant Life, Alaska 03:14 UTC
8. 2.0 112 km ESE of Yakutat, Alaska 18:03 UTC
9. 1.8 112 km ESE of Yakutat, Alaska 18:00 UTC
10. 3.6 113 km ESE of Yakutat, Alaska 17:55 UTC
11. 2.8 112 km ESE of Yakutat, Alaska 06:13 UTC
12. 2.5 85 km ESE of Yakutat, Alaska 21:50 UTC
13. 2.0 112 km ESE of Yakutat, Alaska 03:37 UTC
14. 2.0 112 km ESE of Yakutat, Alaska 18:01 UTC
15. 1.8 99 km NW of Elfin Cove, Alaska 15:27 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:29 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 4.3 on 2021-02-08 — it released about 2,800 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.