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 it was probably too small to be felt, even directly above it. In Eagle River, 9 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.

Earthquakes near other towns within 30 km: Knik-Fairview, Elmendorf Air Force Base, Wasilla, Big Lake, Meadow Lakes, Anchorage.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
3. Around the size people start to feel M 3.0 89× the energy of this one
4. This earthquake M 1.7 about 11 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 130,000,000 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

1. 5.6 11 km NW of Big Lake, Alaska · 34 km NW of this epicentre Oct 7, 1966
2. 5.5 2 km ENE of Eagle River, Alaska · 9 km SSE of this epicentre May 11, 1965
3. 5.5 9 km E of Susitna, Alaska · 42 km WNW of this epicentre Dec 30, 1985
4. 5.3 12 km S of Susitna, Alaska · 49 km W of this epicentre Apr 14, 1964
5. 5.3 3 km NNE of Houston, Alaska · 30 km NNW 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 61.3990, -149.6030. 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. 1.9 2 km SSE of Knik, Alaska 08:27 UTC
2. 2.8 16 km E of Willow, Alaska 17:14 UTC
3. 2.3 8 km SSW of Big Lake, Alaska 10:09 UTC
4. 1.5 8 km NNW of Knik, Alaska 07:36 UTC
5. 1.9 4 km SSW of Anchorage, Alaska 12:11 UTC
6. 1.8 8 km NNE of Point MacKenzie, Alaska 10:20 UTC
7. 1.6 4 km N of Tanaina, Alaska 23:40 UTC
8. 1.6 10 km WNW of Elmendorf Air Force Base, Alaska 20:51 UTC
9. 1.7 0 km NW of Houston, Alaska 03:56 UTC
10. 1.8 5 km S of Willow, Alaska 23:16 UTC
11. 1.8 16 km N of Meadow Lakes, Alaska 10:29 UTC
12. 2.1 16 km N of Meadow Lakes, Alaska 05:43 UTC
13. 1.7 7 km NW of Hope, Alaska 04:40 UTC
14. 2.3 13 km NNE of Meadow Lakes, Alaska 19:23 UTC
15. 1.9 11 km WNW of Anchorage, Alaska 10:48 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:09 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.