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SeismoAtlas

M2.8 earthquake – Nikolski, Alaska

A magnitude 2.8 earthquake struck in the Nikolski, Alaska region at 23:52 UTC on 6 Sept 2026, at a depth of 13 km, according to USGS.

Data: USGS · updated 2026-09-10 01:55 UTC · reviewed

Magnitude
2.8micro
local magnitude (Richter) (ml)
Depth
13.3 km
Status
Reviewed
Origin time
2026-09-06 23:52:26 UTC
Epicentre
52.073° N, 169.271° 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.

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.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey2.8 ml13.3 km52.07° N, 169.27° W–Reviewed

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 13 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

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

62 later earthquakes within 30 km; the largest was M4.0 65 days ago. 203 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.593.210
3.442.612
9.382.711
10.912.85
12.413.110
13.212.713
13.372.722
14.432.735
30.973.210
32.342.910
32.402.710
42.063.210
42.133.410
42.582.610
43.002.710
46.242.810
47.174.035
47.193.110
47.272.77
47.422.710
47.582.713
48.502.712
48.523.740
52.662.611
74.632.511
99.023.310
102.482.810
103.532.718
103.622.719
112.312.614
114.543.135
138.403.335
143.392.539
145.902.59
160.042.85
164.812.716
165.172.935
190.992.710
200.842.710
209.892.952
210.142.818
249.322.714
265.253.810
277.453.245
300.864.038
318.082.923
318.142.910
322.393.010
374.332.55
381.143.114
381.312.910
382.782.714
402.373.334
477.654.035
527.012.521
529.222.78
529.772.87
547.922.63
556.882.810
557.062.810
564.352.510
579.763.110
  1. 4.0Nikolski, Alaska09-08 23:02
  2. 4.0Nikolski, Alaska09-19 12:44
  3. 4.0Fox Islands, Aleutian Islands09-26 21:31
  4. 3.8Nikolski, Alaska09-18 01:07
  5. 3.7Nikolski, Alaska09-09 00:23
  6. 3.4Nikolski, Alaska09-08 18:00
  7. 3.3Nikolski, Alaska09-11 02:53
  8. 3.3Nikolski, Alaska09-12 18:16
  9. 3.3Nikolski, Alaska09-23 18:14
  10. 3.2Nikolski, Alaska09-07 02:28
  11. 3.2Nikolski, Alaska09-08 06:50
  12. 3.2Nikolski, Alaska09-08 17:55
  13. 3.2Nikolski, Alaska09-18 13:19
  14. 3.1Nikolski, Alaska09-07 12:17
  15. 3.1Nikolski, Alaska09-08 23:04
  16. 3.1Nikolski, Alaska09-11 18:24
  17. 3.1Nikolski, Alaska09-22 21:00
  18. 3.1Nikolski, Alaska10-01 03:38
  19. 3.0Nikolski, Alaska09-20 10:15
  20. 2.9Nikolski, Alaska09-08 08:13
  21. 2.9Nikolski, Alaska09-13 21:02
  22. 2.9Nikolski, Alaska09-15 17:45
  23. 2.9Nikolski, Alaska09-20 05:57
  24. 2.9Nikolski, Alaska09-20 06:00
  25. 2.9Nikolski, Alaska09-22 21:10

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 aka2026rrxevv. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · AK (usgs:aka2026rrxevv). Cite as: SeismoAtlas, “M2.8 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/aka2026rrxevv-m2-8-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/aka2026rrxevv. SeismoAtlas is not an official warning service.