Earthquake near Anchor Point, 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 Anchor Point, 4 km away, the estimate is intensity I (not felt). 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: Diamond Ridge, Homer.

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 5.3 on 2017-05-07 — about 500,000 times the energy of this one.

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

1. 6.4 25 km NW of Nanwalek, Alaska · 36 km SW of this epicentre Jun 24, 1963
2. 6.2 16 km WNW of Happy Valley, Alaska · 27 km NNW of this epicentre Dec 24, 1931
3. 6.0 53 km W of Anchor Point, Alaska · 49 km W of this epicentre Apr 18, 1970
4. 5.8 23 km WNW of Happy Valley, Alaska · 30 km NNW of this epicentre May 10, 2014
5. 5.6 7 km SE of Fritz Creek, Alaska · 40 km ESE of this epicentre Dec 26, 1959

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 59.7638, -151.9002. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.1 2 km NNW of Anchor Point, Alaska 05:39 UTC
2. 2.0 4 km WSW of Nanwalek, Alaska 20:32 UTC
3. 1.7 19 km ESE of Ninilchik, Alaska 06:59 UTC
4. 1.8 22 km WNW of Anchor Point, Alaska 22:14 UTC
5. 1.6 7 km WNW of Nanwalek, Alaska 08:19 UTC
6. 1.5 8 km NE of Nikolaevsk, Alaska 05:59 UTC
7. 1.9 12 km WNW of Happy Valley, Alaska 03:00 UTC
8. 1.9 39 km WNW of Happy Valley, Alaska 02:33 UTC
9. 1.5 4 km SSW of Happy Valley, Alaska 14:26 UTC
10. 1.6 12 km NNW of Nanwalek, Alaska 15:03 UTC
11. 1.9 28 km WNW of Anchor Point, Alaska 02:59 UTC
12. 2.0 24 km W of Ninilchik, AK 09:36 UTC
13. 1.5 35 km NW of Nanwalek, Alaska 00:30 UTC
14. 1.5 31 km WSW of Anchor Point, Alaska 07:29 UTC
15. 1.6 20 km NW of Nanwalek, Alaska 15:00 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:23 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.