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SeismoAtlas

M3.0 earthquake – Nikolski, Alaska

A magnitude 3.0 earthquake struck in the Nikolski, Alaska region at 14:49 UTC on 5 Sept 2026, at a depth of 7 km, according to USGS.

Data: USGS · updated 2026-09-10 22:23 UTC · reviewed

Magnitude
3.0minor
local magnitude (Richter) (ml)
Depth
7.3 km
Status
Reviewed
Origin time
2026-09-05 14:49:53 UTC
Epicentre
52.253° N, 169.047° 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 14 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 Survey3.0 ml7.3 km52.25° N, 169.05° W–Reviewed

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How big was it?

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

It released roughly the energy of 477 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 7 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M3.0 releases about 32× the energy of M2.0, and its waves are about 10× taller on a seismogram. Energy: 477 kg of TNT vs 15 kg of TNT.

Each square is the energy of one M2.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

47 later earthquakes within 30 km; the largest was M4.9 23 days ago. 150 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.332.75
3.174.929
3.362.820
10.282.88
14.342.810
16.992.821
18.232.91
20.472.917
24.643.910
30.412.711
31.842.711
33.042.813
35.643.210
36.482.612
42.422.711
46.262.713
47.472.735
64.023.015
65.393.28
65.452.95
75.622.610
76.042.710
79.282.914
80.214.046
80.243.38
80.312.77
80.473.09
80.632.713
81.552.712
81.573.650
115.552.718
121.502.735
132.063.411
135.522.98
145.352.614
171.443.335
197.852.716
198.212.935
233.882.98
242.932.952
282.372.714
298.303.825
333.904.041
351.123.211
351.182.910
360.402.710
510.694.035
  1. 4.9Nikolski, Alaska09-05 18:00
  2. 4.0Nikolski, Alaska09-08 23:02
  3. 4.0Nikolski, Alaska09-19 12:44
  4. 4.0Fox Islands, Aleutian Islands09-26 21:31
  5. 3.9Nikolski, Alaska09-06 15:28
  6. 3.8Nikolski, Alaska09-18 01:07
  7. 3.6Nikolski, Alaska09-09 00:23
  8. 3.4Nikolski, Alaska09-11 02:53
  9. 3.3Nikolski, Alaska09-08 23:04
  10. 3.3Nikolski, Alaska09-12 18:16
  11. 3.2Nikolski, Alaska09-07 02:28
  12. 3.2Nikolski, Alaska09-08 08:13
  13. 3.2Nikolski, Alaska09-20 05:57
  14. 3.0Nikolski, Alaska09-08 06:50
  15. 3.0Nikolski, Alaska09-08 23:17
  16. 2.9Nikolski, Alaska09-06 09:03
  17. 2.9Nikolski, Alaska09-06 11:18
  18. 2.9Nikolski, Alaska09-08 08:16
  19. 2.9Nikolski, Alaska09-08 22:06
  20. 2.9Nikolski, Alaska09-11 06:21
  21. 2.9Nikolski, Alaska09-13 21:02
  22. 2.9Nikolski, Alaska09-15 08:42
  23. 2.9Nikolski, Alaska09-15 17:45
  24. 2.9Nikolski, Alaska09-20 06:00
  25. 2.8Nikolski, Alaska09-05 18:11

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 aka2026rpjbxj. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · AK (usgs:aka2026rpjbxj). Cite as: SeismoAtlas, “M3.0 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/aka2026rpjbxj-m3-0-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/aka2026rpjbxj. SeismoAtlas is not an official warning service.