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SeismoAtlas

M2.9 earthquake – Nikolski, Alaska

A magnitude 2.9 earthquake struck in the Nikolski, Alaska region at 09:03 UTC on 6 Sept 2026, at a depth of 1 km, according to USGS.

Data: USGS · updated 2026-09-09 18:36 UTC · reviewed

Magnitude
2.9micro
local magnitude (Richter) (ml)
Depth
1 km
Status
Reviewed
Origin time
2026-09-06 09:03:38 UTC
Epicentre
52.170° N, 169.025° 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 14 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 · AK, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey2.9 ml1 km52.17° N, 169.03° W–Reviewed

How big was it?

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

It released roughly the energy of 338 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 1 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.9 releases about 32× the energy of M1.9, and its waves are about 10× taller on a seismogram. Energy: 338 kg of TNT vs 11 kg of TNT.

Each square is the energy of one M1.9. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

50 later earthquakes within 30 km; the largest was M4.0 19 days ago. 185 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.9

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.242.917
3.452.818
5.923.110
6.413.910
12.182.711
13.612.711
14.622.76
14.812.813
17.413.210
18.262.612
24.192.711
28.032.713
28.192.722
29.242.735
45.793.015
47.163.28
47.222.95
56.873.210
57.392.610
57.812.710
61.062.914
61.984.046
62.013.38
62.092.77
62.243.09
62.402.713
63.322.712
67.472.611
89.442.511
97.322.718
101.542.622
103.272.735
113.833.411
117.302.98
118.342.718
118.442.719
127.122.614
153.213.335
174.862.85
179.622.716
179.982.935
205.802.710
215.662.98
224.702.952
264.142.714
280.073.825
315.674.041
332.893.211
332.952.910
342.172.710
  1. 4.0Nikolski, Alaska09-08 23:02
  2. 4.0Nikolski, Alaska09-19 12:44
  3. 3.9Nikolski, Alaska09-06 15:28
  4. 3.8Nikolski, Alaska09-18 01:07
  5. 3.4Nikolski, Alaska09-11 02:53
  6. 3.3Nikolski, Alaska09-08 23:04
  7. 3.3Nikolski, Alaska09-12 18:16
  8. 3.2Nikolski, Alaska09-07 02:28
  9. 3.2Nikolski, Alaska09-08 08:13
  10. 3.2Nikolski, Alaska09-08 17:55
  11. 3.2Nikolski, Alaska09-20 05:57
  12. 3.1Nikolski, Alaska09-06 14:58
  13. 3.0Nikolski, Alaska09-08 06:50
  14. 3.0Nikolski, Alaska09-08 23:17
  15. 2.9Nikolski, Alaska09-06 11:18
  16. 2.9Nikolski, Alaska09-08 08:16
  17. 2.9Nikolski, Alaska09-08 22:06
  18. 2.9Nikolski, Alaska09-11 06:21
  19. 2.9Nikolski, Alaska09-13 21:02
  20. 2.9Nikolski, Alaska09-15 08:42
  21. 2.9Nikolski, Alaska09-15 17:45
  22. 2.9Nikolski, Alaska09-20 06:00
  23. 2.8Nikolski, Alaska09-06 12:30
  24. 2.8Nikolski, Alaska09-06 23:52
  25. 2.8Nikolski, Alaska09-13 15:54

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 aka2026rqtokh. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · AK (usgs:aka2026rqtokh). Cite as: SeismoAtlas, “M2.9 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/aka2026rqtokh-m2-9-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/aka2026rqtokh. SeismoAtlas is not an official warning service.