Earthquake near Homer, 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 Homer, 26 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: Anchor Point, Fritz Creek, Diamond Ridge.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
3. Around the size people start to feel M 3.0 11× the energy of this one
4. This earthquake M 2.3 about 85 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 5.4 on 2023-03-19 — about 45,000 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

1. 6.2 16 km WNW of Happy Valley, Alaska · 29 km WNW of this epicentre Dec 24, 1931
2. 6.0 6 km SSE of Fox River, Alaska · 35 km ESE of this epicentre Sep 5, 1961
3. 5.9 13 km N of Fox River, Alaska · 33 km ENE of this epicentre Oct 11, 1940
4. 5.8 23 km WNW of Happy Valley, Alaska · 36 km WNW of this epicentre May 10, 2014
5. 5.6 7 km SE of Fritz Creek, Alaska · 29 km SE 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 59.8790, -151.5370. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.1 7 km NNE of Nikolaevsk, Alaska 21:14 UTC
2. 3.1 11 km SSE of Kasilof, Alaska 03:43 UTC
3. 2.2 1 km W of Homer, Alaska 16:29 UTC
4. 2.0 12 km W of Anchor Point, Alaska 11:25 UTC
5. 2.1 27 km WNW of Clam Gulch, Alaska 09:53 UTC
6. 1.6 18 km SE of Kasilof, Alaska 17:37 UTC
7. 1.6 12 km W of Clam Gulch, Alaska 16:43 UTC
8. 2.2 11 km SE of Kasilof, Alaska 15:06 UTC
9. 1.7 24 km NW of Ninilchik, Alaska 12:27 UTC
10. 1.5 5 km SSW of Ninilchik, Alaska 12:10 UTC
11. 1.7 11 km WSW of Diamond Ridge, Alaska 04:21 UTC
12. 2.9 7 km SW of Nikolaevsk, Alaska 17:58 UTC
13. 3.1 10 km WNW of Seldovia, Alaska 20:26 UTC
14. 1.9 11 km SE of Kasilof, Alaska 08:10 UTC
15. 1.9 21 km WNW of Ninilchik, Alaska 02:19 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:57 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

Revisions

USGS refines a solution as more stations report. Every change we have seen is listed here.

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.