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M2.4 earthquake 74 km WNW of Homer, Alaska, United States

A magnitude 2.4 earthquake struck 74 km WNW of Homer, Alaska, United States at 14:25 local time (22:25 UTC) on 21 Sept 2026, at a depth of 106 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-09-21 22:28 UTC · automatic solution

Magnitude
2.4micro
local magnitude (Richter) (ml)
Depth
106.3 km
Status
Automatic
Origin time
2026-09-21 22:25:00 UTC
Local: 21 Sept 2026, 14:25:00 (America/Anchorage)
Epicentre
59.852° N, 152.802° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
HomerAlaska, United States · pop. 5,51574 kmINot felt
KalifornskyAlaska, United States · pop. 7,850105 kmINot felt
AnchorageAlaska, United States · pop. 289,600220 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · AK.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey2.4 ml106.3 km59.85° N, 152.80° W–Automatic

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How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 60 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 106 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M2.4 releases about 32× the energy of M1.4, and its waves are about 10× taller on a seismogram. Energy: 60 kg of TNT vs 2 kg of TNT.

Each square is the energy of one M1.4. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

43 later earthquakes within 30 km; the largest was M3.6 9 h ago. 5 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.4

43 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.77-0.32
5.33-0.3-1
7.05-0.26
13.031.492
13.521.888
17.42-0.6-2
18.150.22
19.00-0.80
19.71-0.20
23.08-0.50
24.89-0.72
26.101.9136
27.36-0.30
35.792.894
37.141.6108
41.751.487
43.232.8101
44.19-0.6-1
44.832.1135
53.75-0.4-3
55.23-0.52
57.45-0.8-2
60.20-0.6-1
63.24-1.10
63.89-0.61
65.640.45
66.920.06
71.10-0.43
72.47-0.52
75.50-0.36
76.05-0.91
101.092.3134
104.080.1-2
113.292.4124
137.381.7119
138.552.6128
140.082.191
143.022.288
145.98-0.70
146.643.1138
151.04-0.43
162.323.687
166.350.64
  1. 3.657 km W of Homer, Alaska, United States09-28 16:44
  2. 3.1101 km WNW of Homer, Alaska, United States09-28 01:03
  3. 2.869 km WNW of Homer, Alaska, United States09-23 10:12
  4. 2.876 km WNW of Homer, Alaska, United States09-23 17:38
  5. 2.687 km WNW of Homer, Alaska, United States09-27 16:58
  6. 2.485 km WNW of Homer, Alaska, United States09-26 15:42
  7. 2.392 km WNW of Homer, Alaska, United States09-26 03:30
  8. 2.264 km W of Homer, Alaska, United States09-27 21:26
  9. 2.1100 km WNW of Homer, Alaska, United States09-23 19:14
  10. 2.152 km NW of Homer, Alaska, United States09-27 18:29
  11. 1.9101 km WNW of Homer, Alaska, United States09-23 00:30
  12. 1.866 km WNW of Homer, Alaska, United States09-22 11:56
  13. 1.783 km NW of Homer, Alaska, United States09-27 15:47
  14. 1.687 km W of Homer, Alaska, United States09-23 11:33
  15. 1.475 km WNW of Homer, Alaska, United States09-22 11:26
  16. 1.473 km WNW of Homer, Alaska, United States09-23 16:09
  17. 0.696 km WNW of Homer, Alaska, United States09-28 20:45
  18. 0.496 km WNW of Homer, Alaska, United States09-24 16:03
  19. 0.293 km WNW of Homer, Alaska, United States09-22 16:33
  20. 0.196 km WNW of Homer, Alaska, United States09-26 06:29
  21. 0.088 km WNW of Homer, Alaska, United States09-24 17:20
  22. -0.2102 km WNW of Homer, Alaska, United States09-22 05:27
  23. -0.296 km WNW of Homer, Alaska, United States09-22 18:07
  24. -0.399 km WNW of Homer, Alaska, United States09-22 01:11
  25. -0.396 km WNW of Homer, Alaska, United States09-22 03:45

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Reports on SeismoAtlas

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Event id aka2026stmoxb. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · AK (usgs:aka2026stmoxb). Cite as: SeismoAtlas, “M2.4 earthquake 74 km WNW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026stmoxb-m2-4-earthquake-74-km-wnw-of-homer-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026stmoxb. SeismoAtlas is not an official warning service.