62 km E of Denali Park, Alaska

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

At this magnitude and depth, people at rest would likely notice it out to about 41 km (25 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 250,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
4. This earthquake M 3.1 about 1,300 lb of TNT
5. Around the size people start to feel M 3.0 this one released 1.4× 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.1 on 2022-11-16 — about 32 times the energy of this one.

Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:

1. 7.9 2002 Denali Fault, Alaska Earthquake · 37 km SSE of this epicentre Nov 3, 2002
2. 6.6 53 km ENE of Cantwell, Alaska · 38 km SSW of this epicentre Oct 23, 2002
3. 6.1 35 km E of Healy, Alaska · 29 km WNW of this epicentre Jan 21, 1929
4. 6.0 39 km SW of Salcha, Alaska · 49 km N of this epicentre Jul 4, 1929
5. 5.1 77 km E of Cantwell, Alaska · 37 km SSE of this epicentre Jul 5, 2002

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 63.8380, -147.6640. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

1. 1.5 59 km ENE of Denali Park, Alaska 17:09 UTC
2. 1.7 46 km SSW of Harding-Birch Lakes, Alaska 03:06 UTC
3. 3.2 74 km E of Cantwell, Alaska 08:34 UTC
4. 1.8 81 km ESE of Denali Park, Alaska 05:37 UTC
5. 1.7 65 km ENE of Healy, Alaska 16:38 UTC
6. 1.3 63 km ENE of Healy, Alaska 05:27 UTC
7. 1.5 63 km E of Denali Park, Alaska 17:45 UTC
8. 1.7 70 km ESE of Denali Park, Alaska 11:25 UTC
9. 1.5 57 km ENE of Healy, Alaska 10:49 UTC
10. 1.2 73 km E of Cantwell, Alaska 13:31 UTC
11. 1.7 64 km E of Cantwell, Alaska 13:54 UTC
12. 3.0 56 km ENE of Ferry, Alaska 14:02 UTC
13. 1.2 40 km ENE of Healy, Alaska 17:46 UTC
14. 2.3 66 km E of Denali Park, Alaska 00:40 UTC
15. 1.5 66 km ESE of Denali Park, Alaska 09:12 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 03:57 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

Revisions

USGS refines a solution as more stations report. Every change we have seen is listed here.

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.