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SeismoAtlas

M1.3 earthquake – Nikolski, Alaska

A magnitude 1.3 earthquake struck in the Nikolski, Alaska region at 03:50 UTC on 13 Oct 2026, at a depth of 8 km, according to USGS.

revised from M1.5

Data: USGS · updated 2026-10-13 05:31 UTC · reviewed

Magnitude
1.3micro
local magnitude (Richter) (ml)
revised from 1.5
Depth
8.2 km
Status
Reviewed
Origin time
2026-10-13 03:50:52 UTC
Epicentre
52.797° N, 169.892° 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 · AV, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AVheadlineAlaska Volcano Observatory via U.S. Geological Survey1.3 mlwas 1.58.2 km52.80° N, 169.89° W–Reviewed · 1 revision

How big was it?

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

It released roughly the energy of 1 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 8 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.3 releases about 3× the energy of M1.0, and its waves are about 2.1× taller on a seismogram. Energy: 1 kg of TNT vs 477 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

70 later earthquakes within 30 km; the largest was M2.5 30 days ago. 32 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
6.171.28
6.231.29
6.261.39
6.302.57
6.591.28
7.211.19
7.470.98
7.531.010
13.842.010
14.971.99
15.051.05
15.390.89
15.811.86
16.011.15
17.691.45
19.380.98
20.150.74
27.091.19
27.450.59
42.621.79
48.861.21
49.531.65
49.670.90
56.801.48
71.452.210
71.471.27
71.481.012
72.861.59
103.730.914
103.830.611
103.960.75
117.931.58
380.970.812
381.601.110
416.581.98
530.781.49
531.831.29
570.651.07
600.781.77
600.801.18
600.831.87
600.971.10
601.181.08
601.412.15
601.431.14
601.761.36
601.871.28
603.961.37
604.052.39
604.051.76
604.111.011
604.551.38
608.901.27
611.461.40
612.191.59
612.481.21
614.541.79
614.661.29
614.680.59
618.431.05
618.440.86
618.480.712
618.490.510
643.951.99
656.100.8-2
656.130.810
657.510.51
658.881.65
662.320.83
669.001.04
  1. 2.5Nikolski, Alaska10-13 10:08
  2. 2.3Nikolski, Alaska11-07 07:53
  3. 2.2Nikolski, Alaska10-16 03:17
  4. 2.1Nikolski, Alaska11-07 05:15
  5. 2.0Nikolski, Alaska10-13 17:41
  6. 1.9Nikolski, Alaska10-30 12:25
  7. 1.9Nikolski, Alaska11-08 23:48
  8. 1.9Nikolski, Alaska10-13 18:48
  9. 1.8Nikolski, Alaska11-07 04:40
  10. 1.8Nikolski, Alaska10-13 19:39
  11. 1.7Nikolski, Alaska11-07 18:23
  12. 1.7Nikolski, Alaska11-07 04:37
  13. 1.7Nikolski, Alaska10-14 22:27
  14. 1.7Nikolski, Alaska11-07 07:53
  15. 1.6Nikolski, Alaska11-09 14:43
  16. 1.6Nikolski, Alaska10-15 05:22
  17. 1.5Nikolski, Alaska10-16 04:42
  18. 1.5Nikolski, Alaska10-18 01:46
  19. 1.5Nikolski, Alaska11-07 16:02
  20. 1.4Nikolski, Alaska10-13 21:32
  21. 1.4Nikolski, Alaska11-07 15:18
  22. 1.4Nikolski, Alaska11-04 06:37
  23. 1.4Nikolski, Alaska10-15 12:38
  24. 1.3Nikolski, Alaska11-07 05:36
  25. 1.3Nikolski, Alaska11-07 07:48

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 av94446028. First recorded here 13 Oct 2026, 04:33:00 UTC. Solutions: USGS · AV (usgs:av94446028). Cite as: SeismoAtlas, “M1.3 earthquake – Nikolski, Alaska”, https://seismoatlas.com/earthquake/av94446028-m1-3-earthquake-nikolski-alaska, data from USGS.

JSON: /api/v1/events/av94446028. SeismoAtlas is not an official warning service.