Earthquake near Fishhook, AK

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 46 km (29 mi) from the epicentre. In Fishhook, 29 km away, the estimate is intensity II (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: Fishhook 29 km, intensity II · Susitna North 33 km, intensity II · Sutton-Alpine 39 km, intensity II · Tanaina 43 km, intensity II · Lazy Mountain 46 km, intensity II · Palmer 46 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 180,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
4. This earthquake M 3.2 about 1,900 lb of TNT
5. Around the size people start to feel M 3.0 this one released 2× 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 4.2 on 2017-04-26 — 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. 5.9 23 km NE of Willow, Alaska · 25 km WSW of this epicentre Jan 1, 1975
2. 5.8 37 km ENE of Susitna North, Alaska · 33 km N of this epicentre Jul 3, 1929
3. 5.8 14 km NNE of Fishhook, Alaska · 20 km SSE of this epicentre Aug 14, 1984
4. 5.4 25 km NNW of Willow, Alaska · 44 km W of this epicentre May 10, 1962
5. 5.3 3 km NNE of Houston, Alaska · 46 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 62.0068, -149.3006. 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. 1.8 18 km N of Fishhook, Alaska 07:23 UTC
2. 1.7 25 km NNE of Susitna North, Alaska 11:09 UTC
3. 3.0 5 km SSE of Meadow Lakes, Alaska 07:27 UTC
4. 1.7 5 km ENE of Susitna North, Alaska 17:48 UTC
5. 1.8 34 km ENE of Susitna North, Alaska 03:37 UTC
6. 1.5 30 km ENE of Susitna North, Alaska 02:18 UTC
7. 2.4 12 km SSE of Susitna North, Alaska 09:38 UTC
8. 1.6 45 km NE of Susitna North, Alaska 16:43 UTC
9. 1.6 13 km S of Susitna North, Alaska 05:38 UTC
10. 2.0 26 km ESE of Susitna North, Alaska 03:43 UTC
11. 1.5 5 km ENE of Houston, Alaska 16:40 UTC
12. 1.5 14 km WNW of Fishhook, Alaska 12:20 UTC
13. 1.7 9 km WNW of Fishhook, Alaska 19:56 UTC
14. 1.5 15 km SSE of Susitna North, Alaska 12:08 UTC
15. 1.8 21 km NNE of Fishhook, Alaska 22:24 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 03:16 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.