M3.4 earthquake 75 km WNW of Homer, Alaska, United States
A magnitude 3.4 earthquake struck 75 km WNW of Homer, Alaska, United States at 15:21 local time (23:21 UTC) on 3 Sept 2026, at a depth of 112 km, according to USGS.
Data: USGS · updated 2026-09-25 04:55 UTC · reviewed
- Magnitude
- 3.4minor
local magnitude (Richter) (ml) - Depth
- 112.1 km
- Status
- Reviewed
- Origin time
- 2026-09-03 23:21:30 UTC
- Local: 3 Sept 2026, 15:21:30 (America/Anchorage)
- Epicentre
- 59.775° N, 152.860° 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
| Place | Distance | Est. shaking |
|---|---|---|
| HomerAlaska, United States · pop. 5,515 | 75 km | INot felt |
| KalifornskyAlaska, United States · pop. 7,850 | 113 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 228 km | INot 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, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey | 3.4 ml | 112.1 km | 59.77° N, 152.86° W | – | Reviewed |
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How big was it?
Often felt by people at rest close to the epicentre, rarely causes damage.
It released roughly the energy of 1.9 t 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 112 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M3.4 releases about 32× the energy of M2.4, and its waves are about 10× taller on a seismogram. Energy: 1.9 t of TNT vs 60 kg of TNT.
Each square is the energy of one M2.4. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
26 later earthquakes within 30 km; the largest was M3.6 8 h ago. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M3.4
26 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 197.78 | 2.9 | 130 |
| 279.78 | 2.5 | 101 |
| 288.89 | 2.8 | 81 |
| 342.05 | 3.0 | 133 |
| 388.07 | 2.6 | 99 |
| 413.78 | 2.6 | 90 |
| 431.06 | 2.4 | 106 |
| 444.09 | 1.4 | 92 |
| 444.58 | 1.8 | 88 |
| 449.21 | 0.2 | 2 |
| 455.95 | -0.7 | 2 |
| 466.85 | 2.8 | 94 |
| 468.20 | 1.6 | 108 |
| 472.81 | 1.4 | 87 |
| 474.29 | 2.8 | 101 |
| 484.81 | -0.4 | -3 |
| 491.67 | 1.9 | 135 |
| 494.94 | -0.6 | 1 |
| 506.56 | -0.3 | 6 |
| 532.15 | 2.3 | 134 |
| 544.35 | 2.4 | 124 |
| 569.61 | 2.6 | 128 |
| 574.08 | 2.2 | 88 |
| 577.70 | 3.1 | 138 |
| 582.10 | -0.4 | 3 |
| 593.37 | 3.6 | 87 |
- 3.657 km W of Homer, Alaska, United States09-28 16:44
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- 3.0101 km WNW of Homer, Alaska, United States09-18 05:24
- 2.9100 km WNW of Homer, Alaska, United States09-12 05:08
- 2.854 km WNW of Homer, Alaska, United States09-16 00:14
- 2.869 km WNW of Homer, Alaska, United States09-23 10:12
- 2.876 km WNW of Homer, Alaska, United States09-23 17:38
- 2.671 km W of Homer, Alaska, United States09-20 03:25
- 2.667 km W of Homer, Alaska, United States09-21 05:08
- 2.687 km WNW of Homer, Alaska, United States09-27 16:58
- 2.578 km WNW of Homer, Alaska, United States09-15 15:08
- 2.474 km WNW of Homer, Alaska, United States09-21 22:25
- 2.485 km WNW of Homer, Alaska, United States09-26 15:42
- 2.392 km WNW of Homer, Alaska, United States09-26 03:30
- 2.264 km W of Homer, Alaska, United States09-27 21:26
- 1.9100 km W of Homer, Alaska, United States09-24 11:01
- 1.866 km WNW of Homer, Alaska, United States09-22 11:56
- 1.687 km W of Homer, Alaska, United States09-23 11:33
- 1.475 km WNW of Homer, Alaska, United States09-22 11:26
- 1.473 km WNW of Homer, Alaska, United States09-23 16:09
- 0.293 km WNW of Homer, Alaska, United States09-22 16:33
- -0.394 km WNW of Homer, Alaska, United States09-25 01:55
- -0.495 km WNW of Homer, Alaska, United States09-24 04:10
- -0.491 km WNW of Homer, Alaska, United States09-28 05:27
- -0.693 km WNW of Homer, Alaska, United States09-24 14:18
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports close 14 days after an earthquake.
Reports on SeismoAtlas
No reports yet.
Event id aka2026rmibwz. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS · AK (usgs:aka2026rmibwz). Cite as: SeismoAtlas, “M3.4 earthquake 75 km WNW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026rmibwz-m3-4-earthquake-75-km-wnw-of-homer-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026rmibwz. SeismoAtlas is not an official warning service.