48 km E of Denali National Park, Alaska

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

At this magnitude and depth, people at rest would likely notice it out to about 8 km (5 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
3. Around the size people start to feel M 3.0 63× the energy of this one
4. This earthquake M 1.8 about 15 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.2 on 2018-02-25 — about 4,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

1. 7.2 Mount McKinley (Denali) area, Alaska · 34 km SSE of this epicentre Jul 7, 1912
2. 6.4 Mount McKinley (Denali) area, Alaska · 23 km SE of this epicentre Jul 8, 1912
3. 5.8 52 km WSW of Ferry, Alaska · 42 km NE of this epicentre Nov 29, 2000
4. 5.7 66 km ESE of Denali National Park, Alaska · 45 km S of this epicentre Dec 30, 1995
5. 5.5 53 km ESE of Denali National Park, Alaska · 24 km S of this epicentre Apr 1, 1962

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 63.6101, -150.7693. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.4 51 km E of Denali National Park, Alaska 23:24 UTC
2. 1.9 56 km E of Denali National Park, Alaska 22:44 UTC
3. 1.5 69 km ESE of Denali National Park, Alaska 13:04 UTC
4. 1.5 40 km E of Denali National Park, Alaska 11:42 UTC
5. 1.5 70 km ESE of Denali National Park, Alaska 01:24 UTC
6. 2.2 50 km E of Denali National Park, Alaska 07:57 UTC
7. 1.8 37 km SE of Denali National Park, Alaska 03:25 UTC
8. 3.5 66 km SE of Denali National Park, Alaska 14:59 UTC
9. 1.6 69 km W of Cantwell, Alaska 11:09 UTC
10. 1.6 69 km W of Cantwell, Alaska 11:07 UTC
11. 1.6 58 km ESE of Denali National Park, Alaska 05:30 UTC
12. 2.4 64 km ESE of Denali National Park, Alaska 23:39 UTC
13. 1.6 53 km E of Denali National Park, Alaska 20:05 UTC
14. 1.6 70 km SE of Denali National Park, Alaska 10:22 UTC
15. 1.6 69 km ESE of Denali National Park, Alaska 02:27 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 21:16 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.