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M2.8 earthquake 69 km WNW of Homer, Alaska, United States

A magnitude 2.8 earthquake struck 69 km WNW of Homer, Alaska, United States at 02:12 local time (10:12 UTC) on 23 Sept 2026, at a depth of 94 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-09-24 08:33 UTC · automatic solution

Magnitude
2.8micro
local magnitude (Richter) (ml)
Depth
93.7 km
Status
Automatic
Origin time
2026-09-23 10:12:16 UTC
Local: 23 Sept 2026, 02:12:16 (America/Anchorage)
Epicentre
59.859° N, 152.709° 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. 5,51569 kmINot felt
KalifornskyAlaska, United States · pop. 7,850100 kmINot felt
AnchorageAlaska, United States · pop. 289,600216 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 Survey2.8 ml93.7 km59.86° N, 152.71° 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 239 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 94 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M2.8 releases about 32× the energy of M1.8, and its waves are about 10× taller on a seismogram. Energy: 239 kg of TNT vs 8 kg of TNT.

Each square is the energy of one M1.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

27 later earthquakes within 30 km; the largest was M3.6 5 h 18 min ago. 14 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.351.6108
5.961.487
7.442.8101
8.40-0.6-1
17.96-0.4-3
19.45-0.52
21.66-0.8-2
24.41-0.6-1
27.45-1.10
28.10-0.61
29.850.45
31.130.06
35.32-0.43
36.68-0.52
39.72-0.36
40.26-0.91
65.302.3134
68.300.1-2
77.502.4124
101.591.7119
102.762.6128
104.292.191
107.232.288
110.19-0.70
112.902.068
126.533.687
130.560.64
  1. 3.657 km W of Homer, Alaska, United States09-28 16:44
  2. 2.876 km WNW of Homer, Alaska, United States09-23 17:38
  3. 2.687 km WNW of Homer, Alaska, United States09-27 16:58
  4. 2.485 km WNW of Homer, Alaska, United States09-26 15:42
  5. 2.392 km WNW of Homer, Alaska, United States09-26 03:30
  6. 2.264 km W of Homer, Alaska, United States09-27 21:26
  7. 2.152 km NW of Homer, Alaska, United States09-27 18:29
  8. 2.040 km WNW of Homer, Alaska, United States09-28 03:05
  9. 1.783 km NW of Homer, Alaska, United States09-27 15:47
  10. 1.687 km W of Homer, Alaska, United States09-23 11:33
  11. 1.473 km WNW of Homer, Alaska, United States09-23 16:09
  12. 0.696 km WNW of Homer, Alaska, United States09-28 20:45
  13. 0.496 km WNW of Homer, Alaska, United States09-24 16:03
  14. 0.196 km WNW of Homer, Alaska, United States09-26 06:29
  15. 0.088 km WNW of Homer, Alaska, United States09-24 17:20
  16. -0.394 km WNW of Homer, Alaska, United States09-25 01:55
  17. -0.495 km WNW of Homer, Alaska, United States09-24 04:10
  18. -0.494 km WNW of Homer, Alaska, United States09-24 21:31
  19. -0.596 km WNW of Homer, Alaska, United States09-24 05:38
  20. -0.595 km WNW of Homer, Alaska, United States09-24 22:53
  21. -0.696 km WNW of Homer, Alaska, United States09-24 10:36
  22. -0.695 km WNW of Homer, Alaska, United States09-23 18:36
  23. -0.693 km WNW of Homer, Alaska, United States09-24 14:18
  24. -0.797 km WNW of Homer, Alaska, United States09-28 00:23
  25. -0.897 km WNW of Homer, Alaska, United States09-24 07:52

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Reports on SeismoAtlas

No reports yet.

Event id aka2026swgfml. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026swgfml). Cite as: SeismoAtlas, “M2.8 earthquake 69 km WNW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026swgfml-m2-8-earthquake-69-km-wnw-of-homer-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026swgfml. SeismoAtlas is not an official warning service.