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SeismoAtlas

M3.6 earthquake – Nikolski, Alaska

A magnitude 3.6 earthquake struck in the Nikolski, Alaska region at 16:28 UTC on 3 Sept 2026, at a depth of 7 km, according to USGS.

Data: USGS · updated 2026-09-03 20:07 UTC · reviewed

Magnitude
3.6minor
local magnitude (Richter) (ml)
Depth
6.5 km
Status
Reviewed
Origin time
2026-09-03 16:28:53 UTC
Epicentre
51.979° N, 168.907° 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 28 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 · AK, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey3.6 ml6.5 km51.98° N, 168.91° W–Reviewed

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 3.8 t 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 7 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M3.6 releases about 32× the energy of M2.6, and its waves are about 10× taller on a seismogram. Energy: 3.8 t of TNT vs 120 kg of TNT.

Each square is the energy of one M2.6. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

97 later earthquakes within 30 km; the largest was M5.4 70 days ago. 51 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.292.710
0.393.010
0.422.810
0.842.823
1.203.110
1.522.811
2.232.87
2.285.310
2.473.410
2.632.77
2.803.010
2.902.510
2.942.610
3.875.410
6.122.810
6.182.88
6.423.310
6.733.010
6.942.610
7.432.811
7.472.910
7.483.010
7.552.610
8.782.916
9.012.97
9.153.010
9.313.310
9.352.810
9.363.810
9.502.510
9.613.010
9.842.510
9.882.610
9.932.88
10.182.89
10.372.710
11.062.910
11.103.58
12.173.510
12.702.710
12.992.610
13.142.511
13.722.610
14.382.81
14.642.716
14.942.810
15.462.710
21.672.810
34.483.217
34.793.010
35.242.810
35.832.727
37.822.710
43.972.810
44.442.87
47.762.910
56.632.88
59.893.825
60.692.810
64.582.710
68.032.818
70.503.110
70.993.910
78.192.711
79.202.76
79.392.813
81.993.210
91.803.110
92.612.713
111.802.710
121.453.210
122.392.710
126.593.110
126.662.77
132.052.611
154.022.511
166.122.622
178.413.310
182.922.718
225.302.59
239.432.85
270.382.710
289.282.952
328.722.714
344.653.810
397.472.923
397.532.910
406.752.710
453.732.55
460.533.114
460.702.910
462.172.714
608.612.78
609.162.87
627.312.63
636.272.810
659.153.110
  1. 5.4Nikolski, Alaska09-03 20:21
  2. 5.3Nikolski, Alaska09-03 18:45
  3. 3.9Nikolski, Alaska09-06 15:28
  4. 3.8Nikolski, Alaska09-04 01:50
  5. 3.8Nikolski, Alaska09-06 04:22
  6. 3.8Nikolski, Alaska09-18 01:07
  7. 3.5Nikolski, Alaska09-04 03:34
  8. 3.5Nikolski, Alaska09-04 04:38
  9. 3.4Nikolski, Alaska09-03 18:57
  10. 3.3Nikolski, Alaska09-03 22:54
  11. 3.3Nikolski, Alaska09-04 01:47
  12. 3.3Nikolski, Alaska09-11 02:53
  13. 3.2Nikolski, Alaska09-05 02:57
  14. 3.2Nikolski, Alaska09-07 02:28
  15. 3.2Nikolski, Alaska09-08 17:55
  16. 3.1Nikolski, Alaska09-03 17:40
  17. 3.1Nikolski, Alaska09-06 14:58
  18. 3.1Nikolski, Alaska09-07 12:17
  19. 3.1Nikolski, Alaska09-08 23:04
  20. 3.1Nikolski, Alaska09-22 21:00
  21. 3.1Nikolski, Alaska10-01 03:38
  22. 3.0Nikolski, Alaska09-03 16:52
  23. 3.0Nikolski, Alaska09-03 19:16
  24. 3.0Nikolski, Alaska09-03 23:12
  25. 3.0Nikolski, Alaska09-03 23:57

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 aka2026rluipx. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS · AK (usgs:aka2026rluipx). Cite as: SeismoAtlas, “M3.6 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/aka2026rluipx-m3-6-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/aka2026rluipx. SeismoAtlas is not an official warning service.