Earthquake near Lazy Mountain, AK

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In Lazy Mountain, 8 km away, the estimate is intensity I (not felt). 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.

Earthquakes near other towns within 30 km: Sutton-Alpine, Farm Loop, Palmer, Fishhook, Butte, Gateway.

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.

For this area

The largest earthquake within 50 km since 2016 was M 4.1 on 2016-08-02 — about 7,900 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

1. 5.9 23 km NE of Willow, Alaska · 50 km WNW of this epicentre Jan 1, 1975
2. 5.8 14 km NNE of Fishhook, Alaska · 21 km NNW of this epicentre Aug 14, 1984
3. 5.3 3 km NNE of Houston, Alaska · 46 km W of this epicentre Sep 1, 1966
4. 5.3 8 km NW of Knik-Fairview, Alaska · 45 km WSW of this epicentre May 6, 1997
5. 5.3 13 km ESE of Eagle River, Alaska · 50 km SSW of this epicentre Jul 22, 1999

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 61.6941, -148.9114. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.5 12 km WNW of Fishhook, Alaska 00:56 UTC
2. 2.4 13 km ESE of Lazy Mountain, Alaska 07:20 UTC
3. 1.8 5 km N of Lazy Mountain, Alaska 14:32 UTC
4. 2.1 25 km N of Chickaloon, Alaska 10:37 UTC
5. 1.5 16 km ESE of Lazy Mountain, Alaska 14:32 UTC
6. 1.6 6 km NW of Sutton-Alpine, Alaska 12:35 UTC
7. 2.5 31 km NNW of Sutton-Alpine, Alaska 20:20 UTC
8. 1.6 4 km NE of Fishhook, Alaska 01:13 UTC
9. 2.6 Southern Alaska 03:24 UTC
10. 2.0 36 km N of Sutton-Alpine, Alaska 16:45 UTC
11. 2.9 7 km NNW of Chickaloon, Alaska 12:23 UTC
12. 1.6 8 km SSW of Chickaloon, Alaska 21:25 UTC
13. 1.6 37 km NNW of Sutton-Alpine, Alaska 22:46 UTC
14. 1.5 9 km NNW of Chickaloon, Alaska 16:00 UTC
15. 1.6 15 km ENE of Knik River, Alaska 23:29 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 08:58 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.