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M2.2 earthquake 101 km WSW of Kalifornsky, Alaska, United States

A magnitude 2.2 earthquake struck 101 km WSW of Kalifornsky, Alaska, United States at 17:51 local time (01:51 UTC) on 3 Oct 2026, at a depth of 128 km, according to USGS. The solution is preliminary and may be revised.

revised from M1.3

Data: USGS · updated 2026-10-04 01:54 UTC · automatic solution

Magnitude
2.2micro
local magnitude (Richter) (ml)
revised from 1.3
Depth
128.4 km
Status
Automatic
Origin time
2026-10-04 01:51:07 UTC
Local: 3 Oct 2026, 17:51:07 (America/Anchorage)
Epicentre
60.219° N, 153.070° W

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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
KalifornskyAlaska, United States · pop. 7,850101 kmINot felt
KenaiAlaska, United States · pop. 7,661106 kmINot felt
AnchorageAlaska, United States · pop. 289,600205 kmINot felt

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 · AK.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey2.2 mlwas 2.0128.4 km60.22° N, 153.07° W–Automatic · 2 revisions

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How big was it?

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

It released roughly the energy of 30 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 128 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M2.2 releases about 32× the energy of M1.2, and its waves are about 10× taller on a seismogram. Energy: 30 kg of TNT vs 951 g of TNT.

Each square is the energy of one M1.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

26 later earthquakes within 30 km; the largest was M2.6 1 day ago. 78 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.45-0.11
8.42-0.6-2
11.970.85
14.56-0.9-2
16.01-0.81
28.12-0.91
30.681.2118
30.74-0.1-1
30.990.45
34.322.6125
34.940.75
38.400.35
39.280.21
39.580.30
46.84-1.33
46.880.45
50.36-0.85
53.280.642
55.55-0.80
55.840.6100
56.24-0.62
57.68-0.91
58.96-0.91
59.25-1.20
59.51-0.92
71.002.0172
  1. 2.695 km NW of Homer, Alaska, United States10-05 12:10
  2. 2.0113 km WNW of Homer, Alaska, United States10-07 00:51
  3. 1.292 km WNW of Homer, Alaska, United States10-05 08:32
  4. 0.893 km W of Kalifornsky, Alaska, United States10-04 13:49
  5. 0.792 km WNW of Homer, Alaska, United States10-05 12:47
  6. 0.682 km W of Kalifornsky, Alaska, United States10-06 07:08
  7. 0.677 km WSW of Kalifornsky, Alaska, United States10-06 09:41
  8. 0.497 km WNW of Homer, Alaska, United States10-05 08:50
  9. 0.498 km WNW of Homer, Alaska, United States10-06 00:44
  10. 0.394 km WNW of Homer, Alaska, United States10-05 16:15
  11. 0.398 km WNW of Homer, Alaska, United States10-05 17:25
  12. 0.2100 km WNW of Homer, Alaska, United States10-05 17:08
  13. -0.195 km WNW of Homer, Alaska, United States10-05 08:35
  14. -0.194 km WNW of Homer, Alaska, United States10-04 06:18
  15. -0.6100 km WNW of Homer, Alaska, United States10-06 10:05
  16. -0.696 km WNW of Homer, Alaska, United States10-04 10:16
  17. -0.893 km WNW of Homer, Alaska, United States10-04 17:51
  18. -0.897 km WNW of Homer, Alaska, United States10-06 09:24
  19. -0.896 km WNW of Homer, Alaska, United States10-06 04:12
  20. -0.997 km WNW of Homer, Alaska, United States10-04 16:24
  21. -0.996 km WNW of Homer, Alaska, United States10-06 11:32
  22. -0.997 km WNW of Homer, Alaska, United States10-05 05:58
  23. -0.996 km WNW of Homer, Alaska, United States10-06 12:49
  24. -0.997 km WNW of Homer, Alaska, United States10-06 13:21
  25. -1.296 km WNW of Homer, Alaska, United States10-06 13:06

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Reports on SeismoAtlas

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Event id aka2026tpxtjs. First recorded here 4 Oct 2026, 01:52:45 UTC. Solutions: USGS · AK (usgs:aka2026tpxtjs). Cite as: SeismoAtlas, “M2.2 earthquake 101 km WSW of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tpxtjs-m2-2-earthquake-101-km-wsw-of-kalifornsky-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026tpxtjs. SeismoAtlas is not an official warning service.