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SeismoAtlas

M2.7 earthquake – Nikolski, Alaska

A magnitude 2.7 earthquake struck in the Nikolski, Alaska region at 14:36 UTC on 3 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-28 14:00 UTC · reviewed

Magnitude
2.7micro
local magnitude (Richter) (ml)
Depth
10 km
Status
Reviewed
Origin time
2026-09-03 14:36:24 UTC
Epicentre
51.802° N, 169.465° 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 6 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 Survey2.7 ml10 km51.80° N, 169.47° W–Reviewed

How big was it?

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

It released roughly the energy of 169 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.

M2.7 releases about 32× the energy of M1.7, and its waves are about 10× taller on a seismogram. Energy: 169 kg of TNT vs 5 kg of TNT.

Each square is the energy of one M1.7. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

49 later earthquakes within 30 km; the largest was M5.3 25 days ago. 13 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.662.710
2.263.010
2.722.823
4.155.310
4.822.610
8.282.710
8.912.510
9.353.010
9.422.610
9.792.810
11.033.010
11.232.810
11.243.810
11.382.510
11.493.010
11.513.925
11.712.510
11.752.610
11.802.88
12.243.019
12.932.824
12.973.79
13.622.830
14.043.54
14.872.610
15.602.610
17.332.710
24.064.035
24.952.910
39.692.710
43.372.720
46.322.87
49.633.020
61.773.825
61.832.922
69.902.818
72.383.110
81.082.76
92.172.85
93.683.218
94.642.722
123.323.210
133.922.611
184.792.718
184.892.719
227.172.73
241.312.85
272.262.710
291.412.818
  1. 5.3Nikolski, Alaska09-03 18:45
  2. 4.0Nikolski, Alaska09-04 14:39
  3. 3.9Nikolski, Alaska09-04 02:06
  4. 3.8Nikolski, Alaska09-04 01:50
  5. 3.8Nikolski, Alaska09-06 04:22
  6. 3.7Nikolski, Alaska09-04 03:34
  7. 3.5Nikolski, Alaska09-04 04:38
  8. 3.2Nikolski, Alaska09-07 12:17
  9. 3.2Nikolski, Alaska09-08 17:55
  10. 3.1Nikolski, Alaska09-06 14:58
  11. 3.0Nikolski, Alaska09-03 16:52
  12. 3.0Nikolski, Alaska09-03 23:57
  13. 3.0Nikolski, Alaska09-04 01:37
  14. 3.0Nikolski, Alaska09-04 02:05
  15. 3.0Nikolski, Alaska09-04 02:50
  16. 3.0Nikolski, Alaska09-05 16:14
  17. 2.9Nikolski, Alaska09-04 15:33
  18. 2.9Nikolski, Alaska09-06 04:26
  19. 2.8Nikolski, Alaska09-03 17:19
  20. 2.8Nikolski, Alaska09-04 00:23
  21. 2.8Nikolski, Alaska09-04 01:49
  22. 2.8Nikolski, Alaska09-04 02:24
  23. 2.8Nikolski, Alaska09-04 03:32
  24. 2.8Nikolski, Alaska09-04 04:13
  25. 2.8Nikolski, Alaska09-05 12:55

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 us7000te3k. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000te3k). Cite as: SeismoAtlas, “M2.7 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000te3k-m2-7-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000te3k. SeismoAtlas is not an official warning service.