26 km SSW of Lake Minchumina, Alaska

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

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.

1. Northridge, California 1994 M 6.7 350,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
4. 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.

Where

Epicentre 63.6640, -152.5012. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.3 15 km NNE of Lake Minchumina, Alaska 15:53 UTC
2. 1.6 54 km WSW of Denali National Park, Alaska 10:33 UTC
3. 2.4 40 km SSW of Lake Minchumina, Alaska 15:47 UTC
4. 1.6 25 km SSW of Lake Minchumina, Alaska 04:43 UTC
5. 1.6 37 km W of Denali National Park, Alaska 21:24 UTC
6. 2.1 47 km SW of Lake Minchumina, Alaska 08:39 UTC
7. 2.3 13 km WNW of Denali National Park, Alaska 03:04 UTC
8. 1.9 26 km SSW of Lake Minchumina, Alaska 01:34 UTC
9. 1.6 28 km SSW of Denali National Park, Alaska 05:50 UTC
10. 1.8 26 km SW of Lake Minchumina, Alaska 09:15 UTC
11. 1.5 42 km SSW of Lake Minchumina, Alaska 14:22 UTC
12. 1.6 62 km WSW of Denali National Park, Alaska 23:13 UTC
13. 2.4 58 km WSW of Denali National Park, Alaska 00:21 UTC
14. 1.5 17 km WNW of Denali National Park, Alaska 01:40 UTC
15. 2.0 30 km WSW of Denali National Park, Alaska 04:13 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:09 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.