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 101 km (63 mi) from the epicentre. In Susitna North, 9 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 9 km, intensity III · Willow 45 km, intensity II · Fishhook 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 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 5,600× the energy of this one
2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
3. Magna, Utah 2020 M 5.7 180× the energy of this one
4. This earthquake M 4.2 about 30 tons of TNT
5. Around the size people start to feel M 3.0 this one released 63× 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 4.3 on 2017-08-21 — about 1.4 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

1. 5.9 23 km NE of Willow, Alaska · 24 km S of this epicentre Jan 1, 1975
2. 5.8 37 km ENE of Susitna North, Alaska · 33 km NE of this epicentre Jul 3, 1929
3. 5.8 14 km NNE of Fishhook, Alaska · 43 km SE of this epicentre Aug 14, 1984
4. 5.4 25 km NNW of Willow, Alaska · 28 km SW of this epicentre May 10, 1962
5. 5.1 21 km SSE of Susitna North, Alaska · 16 km S of this epicentre Dec 30, 1974

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 62.1249, -149.7047. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.3 16 km N of Meadow Lakes, Alaska 04:22 UTC
2. 2.7 35 km ENE of Susitna North, Alaska 20:45 UTC
3. 1.7 17 km N of Fishhook, Alaska 08:05 UTC
4. 1.9 23 km ENE of Willow, Alaska 20:25 UTC
5. 1.9 29 km ENE of Susitna North, Alaska 09:09 UTC
6. 2.1 33 km E of Chase, Alaska 01:06 UTC
7. 1.7 32 km ENE of Susitna North, Alaska 08:04 UTC
8. 1.6 20 km N of Meadow Lakes, Alaska 09:55 UTC
9. 1.5 5 km N of Houston, Alaska 06:49 UTC
10. 1.6 22 km SSW of Susitna North, Alaska 20:59 UTC
11. 1.9 2 km NW of Willow, Alaska 08:04 UTC
12. 2.9 21 km N of Willow, Alaska 20:26 UTC
13. 1.5 12 km ENE of Susitna North, Alaska 02:48 UTC
14. 2.0 8 km ESE of Willow, Alaska 18:33 UTC
15. 2.1 16 km N of Meadow Lakes, Alaska 05:45 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 09:50 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.