103 km NNW of Arctic Village, 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
3. Around the size people start to feel M 3.0 180× the energy of this one
4. This earthquake M 1.5 about 5.4 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 69.0194, -146.2456. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.7 105 km NNW of Arctic Village, Alaska 20:57 UTC
2. 1.5 106 km NNW of Arctic Village, Alaska 04:56 UTC
3. 2.9 105 km NNW of Arctic Village, Alaska 04:42 UTC
4. 1.6 75 km NNW of Arctic Village, Alaska 14:46 UTC
5. 2.3 95 km N of Arctic Village, Alaska 06:08 UTC
6. 1.5 112 km NNW of Arctic Village, Alaska 04:31 UTC
7. 1.6 108 km NNW of Arctic Village, Alaska 06:42 UTC
8. 2.4 115 km NNW of Arctic Village, Alaska 07:27 UTC
9. 2.2 115 km NNW of Arctic Village, Alaska 02:05 UTC
10. 1.8 115 km NNW of Arctic Village, Alaska 02:04 UTC
11. 2.9 115 km NNW of Arctic Village, Alaska 00:54 UTC
12. 2.4 92 km N of Arctic Village, Alaska 10:40 UTC
13. 1.6 107 km NNW of Arctic Village, Alaska 05:50 UTC
14. 2.6 71 km NW of Arctic Village, Alaska 05:35 UTC
15. 1.8 129 km NNW of Arctic Village, Alaska 16:35 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 22:58 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 4.2 on 2018-10-01 — it released about 11,000 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.