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SeismoAtlas

M2.6 earthquake – Nikolski, Alaska

A magnitude 2.6 earthquake struck in the Nikolski, Alaska region at 06:12 UTC on 4 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-07 06:16 UTC · reviewed

Magnitude
2.6micro
local magnitude (Richter) (ml)
Depth
10 km
Status
Reviewed
Origin time
2026-09-04 06:12:08 UTC
Epicentre
51.978° N, 169.308° 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 km51.98° N, 169.31° 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

78 later earthquakes within 30 km; the largest was M4.9 23 days ago. 143 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.922.716
1.222.810
1.742.710
2.332.635
2.532.711
3.223.512
4.193.215
5.422.711
7.942.810
8.464.035
9.362.910
19.813.129
20.763.217
21.073.010
21.522.810
22.112.727
24.102.710
26.952.714
27.772.720
30.252.810
30.722.87
34.043.020
35.804.929
42.912.88
46.173.825
46.242.922
46.972.810
49.622.821
50.862.91
53.102.917
54.312.818
56.783.110
57.273.910
63.042.711
64.472.711
65.482.76
65.672.813
68.273.210
69.112.612
75.052.711
76.582.85
78.083.218
78.892.713
79.042.722
80.102.735
96.653.015
98.013.28
98.082.95
107.733.210
108.672.710
111.912.914
112.863.38
112.942.77
113.103.09
113.262.713
114.182.712
118.332.611
140.302.511
164.693.411
168.152.98
169.202.718
169.302.719
177.982.614
180.213.135
204.073.335
209.062.539
211.572.73
225.712.85
230.482.716
256.662.710
266.512.98
275.562.952
275.812.818
315.002.714
330.933.825
343.123.245
383.753.211
383.812.910
  1. 4.9Nikolski, Alaska09-05 18:00
  2. 4.0Nikolski, Alaska09-04 14:39
  3. 3.9Nikolski, Alaska09-06 15:28
  4. 3.8Nikolski, Alaska09-06 04:22
  5. 3.8Nikolski, Alaska09-18 01:07
  6. 3.5Nikolski, Alaska09-04 09:25
  7. 3.4Nikolski, Alaska09-11 02:53
  8. 3.3Nikolski, Alaska09-08 23:04
  9. 3.3Nikolski, Alaska09-12 18:16
  10. 3.2Nikolski, Alaska09-04 10:23
  11. 3.2Nikolski, Alaska09-05 02:57
  12. 3.2Nikolski, Alaska09-07 02:28
  13. 3.2Nikolski, Alaska09-07 12:17
  14. 3.2Nikolski, Alaska09-08 08:13
  15. 3.2Nikolski, Alaska09-08 17:55
  16. 3.2Nikolski, Alaska09-18 13:19
  17. 3.2Nikolski, Alaska09-20 05:57
  18. 3.1Nikolski, Alaska09-05 02:00
  19. 3.1Nikolski, Alaska09-06 14:58
  20. 3.1Nikolski, Alaska09-11 18:24
  21. 3.0Nikolski, Alaska09-05 03:16
  22. 3.0Nikolski, Alaska09-05 16:14
  23. 3.0Nikolski, Alaska09-08 06:50
  24. 3.0Nikolski, Alaska09-08 23:17
  25. 2.9Nikolski, Alaska09-04 15:33

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 us7000teee. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000teee). Cite as: SeismoAtlas, “M2.6 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000teee-m2-6-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000teee. SeismoAtlas is not an official warning service.

M2.6 earthquake – Nikolski, Alaska · SeismoAtlas