Skip to content
SeismoAtlas

M2.7 earthquake – Nikolski, Alaska

A magnitude 2.7 earthquake struck in the Nikolski, Alaska region at 22:53 UTC on 3 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-20 05:12 UTC · reviewed

Magnitude
2.7micro
local magnitude (Richter) (ml)
Depth
10 km
Status
Reviewed
Origin time
2026-09-03 22:53:05 UTC
Epicentre
51.982° N, 169.502° 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 km51.98° N, 169.50° 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

96 later earthquakes within 30 km; the largest was M4.9 23 days ago. 93 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.023.310
0.333.010
0.542.610
0.632.510
1.022.811
1.062.910
1.073.010
1.142.610
1.512.810
2.612.97
2.753.010
2.913.310
2.952.810
2.963.810
3.102.510
3.213.010
3.233.925
3.432.510
3.472.610
3.522.88
3.963.019
4.662.824
4.693.79
5.342.830
5.763.54
6.592.610
6.742.511
7.322.610
8.542.810
9.062.710
9.652.635
9.852.711
10.543.512
12.742.711
15.262.810
15.784.035
16.682.910
27.133.129
28.083.217
28.393.010
28.842.810
29.432.727
31.422.710
34.262.714
35.092.720
37.572.810
38.042.87
41.353.020
43.124.929
50.232.88
53.493.825
53.562.922
54.282.810
56.932.821
60.422.917
61.632.818
64.103.110
64.583.910
70.352.711
71.792.711
72.802.76
72.992.813
75.583.210
82.372.711
83.902.85
85.403.218
86.362.722
87.422.735
105.333.28
115.053.210
115.992.710
120.183.38
120.262.77
120.413.09
120.572.713
125.652.611
147.622.511
172.013.411
176.512.718
176.612.719
185.302.614
187.533.135
211.393.335
216.382.539
218.892.73
233.032.85
237.802.716
263.982.710
273.832.98
282.882.952
283.132.818
322.312.714
338.243.825
350.443.245
391.073.211
391.132.910
  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, Alaska09-03 22:54
  13. 3.3Nikolski, Alaska09-04 01:47
  14. 3.3Nikolski, Alaska09-08 23:04
  15. 3.3Nikolski, Alaska09-12 18:16
  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 us7000tfy3. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS (usgs:us7000tfy3). Cite as: SeismoAtlas, “M2.7 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/us7000tfy3-m2-7-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/us7000tfy3. SeismoAtlas is not an official warning service.