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SeismoAtlas

M2.8 earthquake – Nikolski, Alaska

A magnitude 2.8 earthquake struck in the Nikolski, Alaska region at 01:06 UTC on 6 Sept 2026, at a depth of 8 km, according to USGS.

Data: USGS · updated 2026-09-09 15:53 UTC · reviewed

Magnitude
2.8micro
local magnitude (Richter) (ml)
Depth
7.8 km
Status
Reviewed
Origin time
2026-09-06 01:06:51 UTC
Epicentre
52.130° N, 169.192° 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 10 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 Survey2.8 ml7.8 km52.13° N, 169.19° 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 8 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

73 later earthquakes within 30 km; the largest was M4.0 65 days ago. 191 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.263.825
3.332.922
4.052.810
6.702.821
7.952.710
10.192.917
11.402.818
13.873.110
14.353.910
20.132.711
21.562.711
22.572.76
22.762.813
25.353.210
26.202.612
32.142.711
35.173.110
35.972.713
36.132.722
37.192.735
53.733.210
55.102.910
55.162.710
64.823.210
64.893.410
65.342.610
65.762.710
69.002.810
69.934.035
69.953.110
70.032.77
70.182.710
70.342.713
71.262.712
71.283.740
75.422.611
97.392.511
105.272.621
111.222.735
121.783.310
125.242.810
126.282.718
126.382.719
135.072.614
137.303.135
161.163.335
166.152.539
182.802.85
187.572.716
187.932.935
213.752.710
223.602.710
232.652.952
232.902.818
272.082.714
288.013.810
323.624.038
340.842.923
340.902.910
345.153.010
350.122.710
397.092.55
403.903.114
404.072.910
405.542.714
425.133.334
500.414.035
549.772.521
552.532.87
570.682.63
579.642.810
579.822.810
602.523.110
  1. 4.0Nikolski, Alaska09-08 23:02
  2. 4.0Nikolski, Alaska09-19 12:44
  3. 4.0Fox Islands, Aleutian Islands09-26 21:31
  4. 3.9Nikolski, Alaska09-06 15:28
  5. 3.8Nikolski, Alaska09-06 04:22
  6. 3.8Nikolski, Alaska09-18 01:07
  7. 3.7Nikolski, Alaska09-09 00:23
  8. 3.4Nikolski, Alaska09-08 18:00
  9. 3.3Nikolski, Alaska09-11 02:53
  10. 3.3Nikolski, Alaska09-12 18:16
  11. 3.3Nikolski, Alaska09-23 18:14
  12. 3.2Nikolski, Alaska09-07 02:28
  13. 3.2Nikolski, Alaska09-08 06:50
  14. 3.2Nikolski, Alaska09-08 17:55
  15. 3.1Nikolski, Alaska09-06 14:58
  16. 3.1Nikolski, Alaska09-07 12:17
  17. 3.1Nikolski, Alaska09-08 23:04
  18. 3.1Nikolski, Alaska09-11 18:24
  19. 3.1Nikolski, Alaska09-22 21:00
  20. 3.1Nikolski, Alaska10-01 03:38
  21. 3.0Nikolski, Alaska09-20 10:15
  22. 2.9Nikolski, Alaska09-06 04:26
  23. 2.9Nikolski, Alaska09-06 11:18
  24. 2.9Nikolski, Alaska09-08 08:13
  25. 2.9Nikolski, Alaska09-13 21:02

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 aka2026rqdqxm. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · AK (usgs:aka2026rqdqxm). Cite as: SeismoAtlas, “M2.8 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/aka2026rqdqxm-m2-8-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/aka2026rqdqxm. SeismoAtlas is not an official warning service.