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SeismoAtlas

M3.0 earthquake – Nikolski, Alaska

A magnitude 3.0 earthquake struck in the Nikolski, Alaska region at 23:57 UTC on 3 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-21 00:51 UTC · reviewed

Magnitude
3.0minor
local magnitude (Richter) (ml)
Depth
10 km
Status
Reviewed
Origin time
2026-09-03 23:57:25 UTC
Epicentre
51.847° N, 169.159° 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
No towns within 400 km. This is a remote area.

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. Likely felt out to about 12 km.

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, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGSheadlineUSGS NEIC via U.S. Geological Survey3.0 ml10 km51.85° N, 169.16° W–Reviewed

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 477 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M3.0 releases about 32× the energy of M2.0, and its waves are about 10× taller on a seismogram. Energy: 477 kg of TNT vs 15 kg of TNT.

Each square is the energy of one M2.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

61 later earthquakes within 30 km; the largest was M4.0 24 days ago. 58 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.072.610
0.442.810
1.542.97
1.683.010
1.843.310
1.882.810
1.893.810
2.032.510
2.143.010
2.163.925
2.362.510
2.402.610
2.452.88
2.893.019
3.582.824
3.623.79
4.272.830
4.693.54
5.522.610
5.672.511
6.252.610
7.982.710
14.192.810
14.714.035
15.602.910
27.003.217
27.323.010
27.762.810
28.362.727
30.342.710
34.022.720
36.502.810
36.972.87
40.283.020
52.423.825
52.482.922
53.212.810
60.552.818
63.033.110
63.513.910
71.732.76
71.922.813
82.822.85
84.333.218
85.292.722
113.973.210
114.922.710
124.572.611
146.552.511
170.943.411
175.442.718
175.542.719
217.822.73
231.962.85
262.912.710
272.762.98
281.812.952
282.062.818
321.242.714
390.003.211
390.062.910
  1. 4.0Nikolski, Alaska09-04 14:39
  2. 3.9Nikolski, Alaska09-04 02:06
  3. 3.9Nikolski, Alaska09-06 15:28
  4. 3.8Nikolski, Alaska09-04 01:50
  5. 3.8Nikolski, Alaska09-06 04:22
  6. 3.7Nikolski, Alaska09-04 03:34
  7. 3.5Nikolski, Alaska09-04 04:38
  8. 3.4Nikolski, Alaska09-11 02:53
  9. 3.3Nikolski, Alaska09-04 01:47
  10. 3.2Nikolski, Alaska09-05 02:57
  11. 3.2Nikolski, Alaska09-07 12:17
  12. 3.2Nikolski, Alaska09-08 17:55
  13. 3.2Nikolski, Alaska09-20 05:57
  14. 3.1Nikolski, Alaska09-06 14:58
  15. 3.0Nikolski, Alaska09-04 01:37
  16. 3.0Nikolski, Alaska09-04 02:05
  17. 3.0Nikolski, Alaska09-04 02:50
  18. 3.0Nikolski, Alaska09-05 03:16
  19. 3.0Nikolski, Alaska09-05 16:14
  20. 2.9Nikolski, Alaska09-04 01:29
  21. 2.9Nikolski, Alaska09-04 15:33
  22. 2.9Nikolski, Alaska09-06 04:26
  23. 2.9Nikolski, Alaska09-15 08:42
  24. 2.9Nikolski, Alaska09-15 17:45
  25. 2.9Nikolski, Alaska09-20 06:00

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 us7000tfy0. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000tfy0). Cite as: SeismoAtlas, “M3.0 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000tfy0-m3-0-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000tfy0. SeismoAtlas is not an official warning service.