Earthquake near Eagle River, AK

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 9 km (6 mi) from the epicentre. In Eagle River, 8 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: Eagle River 8 km, intensity II. Estimated for each town centre; each link is that town's own record.

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 7.1 on 2018-11-30 — about 250,000,000 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

1. 5.6 11 km NW of Big Lake, Alaska · 38 km WNW of this epicentre Oct 7, 1966
2. 5.5 2 km ENE of Eagle River, Alaska · 7 km S of this epicentre May 11, 1965
3. 5.5 9 km E of Susitna, Alaska · 46 km WNW of this epicentre Dec 30, 1985
4. 5.3 3 km NNE of Houston, Alaska · 32 km NNW of this epicentre Sep 1, 1966
5. 5.3 8 km NW of Knik-Fairview, Alaska · 21 km NNW of this epicentre May 6, 1997

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 61.3951, -149.5293. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.5 6 km NW of Tanaina, Alaska 02:04 UTC
2. 2.7 3 km SSE of Big Lake, Alaska 00:27 UTC
3. 1.5 6 km NW of Fishhook, Alaska 03:31 UTC
4. 3.2 25 km N of Girdwood, Alaska 23:42 UTC
5. 1.6 18 km SSE of Elmendorf Air Force Base, Alaska 16:55 UTC
6. 2.2 1 km ENE of Big Lake, Alaska 05:58 UTC
7. 2.9 16 km ENE of Willow, Alaska 10:27 UTC
8. 1.5 5 km WNW of Meadow Lakes, Alaska 17:16 UTC
9. 2.1 8 km W of Houston, Alaska 13:32 UTC
10. 1.8 7 km NE of Point MacKenzie, Alaska 04:29 UTC
11. 1.5 2 km WNW of Big Lake, Alaska 23:57 UTC
12. 3.6 1 km WSW of Big Lake, Alaska 22:29 UTC
13. 2.4 2 km SSE of Anchorage, Alaska 08:03 UTC
14. 1.5 11 km SSW of Anchorage, Alaska 21:33 UTC
15. 1.5 18 km ENE of Willow, Alaska 01:53 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:37 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.