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SeismoAtlas

M2.7 earthquake – Nikolski, Alaska

A magnitude 2.7 earthquake struck in the Nikolski, Alaska region at 07:07 UTC on 4 Sept 2026, at a depth of 16 km, according to USGS.

Data: USGS · updated 2026-09-13 08:53 UTC · reviewed

Magnitude
2.7micro
local magnitude (Richter) (ml)
Depth
15.9 km
Status
Reviewed
Origin time
2026-09-04 07:07:10 UTC
Epicentre
52.153° N, 169.127° 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.

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 ml15.9 km52.15° N, 169.13° 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 16 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

91 later earthquakes within 30 km; the largest was M4.9 23 days ago. 158 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.302.810
0.822.710
1.192.75
1.422.635
1.612.711
1.882.722
2.303.512
3.283.215
4.502.711
4.932.635
7.032.810
7.544.035
10.372.625
18.893.129
19.843.217
20.153.010
20.602.810
21.052.535
21.202.727
23.182.710
26.032.714
26.862.720
29.332.810
29.802.87
31.713.07
33.042.75
33.123.020
34.884.929
35.072.820
41.992.88
45.253.825
45.322.922
46.052.810
48.702.821
49.942.91
52.182.917
53.392.818
55.863.110
56.353.910
62.122.711
63.552.711
64.562.76
64.752.813
67.353.210
68.202.612
74.132.711
77.173.218
77.972.713
78.132.722
79.182.735
95.733.015
97.103.28
97.162.95
106.813.210
106.883.410
107.332.610
107.752.710
111.002.914
111.924.046
111.953.38
112.032.77
112.183.09
112.342.713
113.262.712
113.283.650
117.412.611
139.382.511
147.262.718
151.482.622
153.212.735
163.773.411
167.242.98
168.282.718
168.382.719
177.062.614
179.303.135
203.163.335
224.802.85
229.562.716
229.922.935
255.752.710
265.602.98
274.642.952
274.902.818
314.082.714
330.013.825
365.614.041
382.833.211
382.892.910
392.122.710
542.404.035
  1. 4.9Nikolski, Alaska09-05 18:00
  2. 4.0Nikolski, Alaska09-04 14:39
  3. 4.0Nikolski, Alaska09-08 23:02
  4. 4.0Nikolski, Alaska09-19 12:44
  5. 4.0Fox Islands, Aleutian Islands09-26 21:31
  6. 3.9Nikolski, Alaska09-06 15:28
  7. 3.8Nikolski, Alaska09-06 04:22
  8. 3.8Nikolski, Alaska09-18 01:07
  9. 3.6Nikolski, Alaska09-09 00:23
  10. 3.5Nikolski, Alaska09-04 09:25
  11. 3.4Nikolski, Alaska09-08 18:00
  12. 3.4Nikolski, Alaska09-11 02:53
  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, Alaska09-20 05:57
  22. 3.1Nikolski, Alaska09-05 02:00
  23. 3.1Nikolski, Alaska09-06 14:58
  24. 3.1Nikolski, Alaska09-11 18:24
  25. 3.0Nikolski, Alaska09-05 03:16

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 us7000teek. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000teek). Cite as: SeismoAtlas, “M2.7 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000teek-m2-7-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000teek. SeismoAtlas is not an official warning service.