northern Alaska

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
3. Around the size people start to feel M 3.0 45× the energy of this one
4. This earthquake M 1.9 about 21 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 68.4708, -148.2255. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.8 138 km ENE of Anaktuvuk Pass, Alaska 23:37 UTC
2. 1.5 130 km WNW of Arctic Village, Alaska 04:26 UTC
3. 1.5 117 km WNW of Arctic Village, Alaska 06:01 UTC
4. 2.3 121 km WNW of Arctic Village, Alaska 10:29 UTC
5. 1.7 132 km WNW of Arctic Village, Alaska 00:53 UTC
6. 2.5 96 km WNW of Arctic Village, Alaska 22:18 UTC
7. 1.8 116 km WNW of Arctic Village, Alaska 16:58 UTC
8. 2.5 126 km NNE of Wiseman, Alaska 06:22 UTC
9. 1.5 101 km W of Arctic Village, Alaska 21:44 UTC
10. 1.6 109 km NW of Arctic Village, Alaska 07:07 UTC
11. 1.6 108 km WNW of Arctic Village, Alaska 10:25 UTC
12. 1.6 110 km NW of Arctic Village, Alaska 03:32 UTC
13. 2.1 108 km WNW of Arctic Village, Alaska 06:24 UTC
14. 2.2 125 km WNW of Arctic Village, Alaska 18:53 UTC
15. 1.7 107 km NE of Wiseman, Alaska 23:23 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:15 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 4.0 on 2021-07-08 — it released about 1,400 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.