Earthquake near Susitna North, AK

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 87 km (54 mi) from the epicentre. In Susitna North, 24 km away, the estimate is intensity III (weak). 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.

Likely felt in: Susitna North 24 km, intensity III · Fishhook 32 km, intensity II · Willow 37 km, intensity II · Tanaina 41 km, intensity II · Sutton-Alpine 47 km, intensity II · Palmer 49 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 11,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
3. Magna, Utah 2020 M 5.7 350× the energy of this one
4. This earthquake M 4.0 about 15 tons of TNT
5. Around the size people start to feel M 3.0 this one released 32× 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 (31 mi) since our catalogue begins in 2016. No other earthquake of M4 or more has been recorded this close in that time.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

1. 5.9 23 km NE of Willow, Alaska · 13 km SW of this epicentre Jan 1, 1975
2. 5.8 37 km ENE of Susitna North, Alaska · 39 km NNE of this epicentre Jul 3, 1929
3. 5.8 14 km NNE of Fishhook, Alaska · 28 km ESE of this epicentre Aug 14, 1984
4. 5.4 25 km NNW of Willow, Alaska · 30 km W of this epicentre May 10, 1962
5. 5.3 3 km NNE of Houston, Alaska · 39 km SSW of this epicentre Sep 1, 1966

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 61.9923, -149.5570. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.8 15 km NNW of Meadow Lakes, Alaska 16:40 UTC
2. 2.3 4 km W of Houston, Alaska 22:51 UTC
3. 1.5 15 km NNE of Susitna North, Alaska 09:44 UTC
4. 2.1 28 km N of Fishhook, Alaska 05:30 UTC
5. 2.4 20 km N of Fishhook, Alaska 11:48 UTC
6. 2.2 4 km SE of Talkeetna, Alaska 03:57 UTC
7. 1.5 13 km ENE of Talkeetna, Alaska 08:24 UTC
8. 2.1 22 km E of Susitna North, Alaska 22:10 UTC
9. 1.6 24 km E of Susitna North, Alaska 16:40 UTC
10. 2.7 7 km ENE of Talkeetna, Alaska 12:51 UTC
11. 1.6 17 km N of Meadow Lakes, Alaska 07:40 UTC
12. 1.9 8 km N of Meadow Lakes, Alaska 21:53 UTC
13. 1.8 38 km NNW of Sutton-Alpine, Alaska 07:16 UTC
14. 2.4 7 km NNE of Meadow Lakes, Alaska 07:08 UTC
15. 1.5 5 km SSW of Meadow Lakes, Alaska 04:29 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:07 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.