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SeismoAtlas

M2.6 earthquake – Nikolski, Alaska

A magnitude 2.6 earthquake struck in the Nikolski, Alaska region at 00:01 UTC on 4 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-21 00:17 UTC · reviewed

Magnitude
2.6micro
local magnitude (Richter) (ml)
Depth
10 km
Status
Reviewed
Origin time
2026-09-04 00:01:42 UTC
Epicentre
52.001° N, 169.253° 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 3 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 Survey2.6 ml10 km52.00° N, 169.25° W–Reviewed

How big was it?

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

It released roughly the energy of 120 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.

M2.6 releases about 32× the energy of M1.6, and its waves are about 10× taller on a seismogram. Energy: 120 kg of TNT vs 4 kg of TNT.

Each square is the energy of one M1.6. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

105 later earthquakes within 30 km; the largest was M4.9 23 days ago. 128 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.372.810
1.232.916
1.462.97
1.603.010
1.773.310
1.802.810
1.813.810
1.962.510
2.073.010
2.093.925
2.292.510
2.332.610
2.382.88
2.633.010
2.823.019
3.512.824
3.553.79
3.662.824
4.202.830
4.623.54
5.072.812
5.162.710
5.452.610
5.602.511
6.172.610
6.832.81
7.092.716
7.392.810
7.912.710
8.512.635
8.702.711
8.972.722
9.393.512
10.373.215
11.602.711
14.122.810
14.644.035
15.532.910
25.983.129
26.933.217
27.253.010
27.692.810
28.292.727
30.272.710
33.122.714
33.952.720
36.422.810
36.892.87
40.213.020
41.974.929
49.092.88
52.343.825
52.412.922
53.142.810
55.792.821
57.032.91
59.272.917
60.482.818
62.953.110
63.443.910
69.212.711
70.642.711
71.662.76
71.852.813
74.443.210
75.292.612
81.222.711
82.752.85
84.263.218
85.062.713
85.222.722
86.272.735
102.823.015
104.193.28
104.252.95
113.903.210
114.422.610
114.852.710
118.092.914
119.043.38
119.122.77
119.273.09
119.432.713
120.352.712
124.502.611
146.472.511
170.873.411
174.332.98
175.372.718
175.472.719
184.152.614
186.393.135
210.253.335
217.752.73
231.892.85
236.652.716
262.842.710
272.692.98
281.742.952
281.992.818
321.172.714
337.103.825
349.293.245
389.923.211
389.982.910
  1. 4.9Nikolski, Alaska09-05 18:00
  2. 4.0Nikolski, Alaska09-04 14:39
  3. 3.9Nikolski, Alaska09-04 02:06
  4. 3.9Nikolski, Alaska09-06 15:28
  5. 3.8Nikolski, Alaska09-04 01:50
  6. 3.8Nikolski, Alaska09-06 04:22
  7. 3.8Nikolski, Alaska09-18 01:07
  8. 3.7Nikolski, Alaska09-04 03:34
  9. 3.5Nikolski, Alaska09-04 04:38
  10. 3.5Nikolski, Alaska09-04 09:25
  11. 3.4Nikolski, Alaska09-11 02:53
  12. 3.3Nikolski, Alaska09-04 01:47
  13. 3.3Nikolski, Alaska09-08 23:04
  14. 3.3Nikolski, Alaska09-12 18:16
  15. 3.2Nikolski, Alaska09-04 10:23
  16. 3.2Nikolski, Alaska09-05 02:57
  17. 3.2Nikolski, Alaska09-07 02:28
  18. 3.2Nikolski, Alaska09-07 12:17
  19. 3.2Nikolski, Alaska09-08 08:13
  20. 3.2Nikolski, Alaska09-08 17:55
  21. 3.2Nikolski, Alaska09-18 13:19
  22. 3.2Nikolski, Alaska09-20 05:57
  23. 3.1Nikolski, Alaska09-05 02:00
  24. 3.1Nikolski, Alaska09-06 14:58
  25. 3.1Nikolski, Alaska09-11 18:24

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 us7000te87. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000te87). Cite as: SeismoAtlas, “M2.6 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000te87-m2-6-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000te87. SeismoAtlas is not an official warning service.