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M2.6 earthquake 54 km W of Kalifornsky, Alaska, United States

A magnitude 2.6 earthquake struck 54 km W of Kalifornsky, Alaska, United States at 02:17 local time (10:17 UTC) on 23 Sept 2026, at a depth of 109 km, according to USGS. The solution is preliminary and may be revised.

1 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-24 08:37 UTC · automatic solution

Magnitude
2.6micro
local magnitude (Richter) (ml)
Depth
109.1 km
Status
Automatic
Origin time
2026-09-23 10:17:51 UTC
Local: 23 Sept 2026, 02:17:51 (America/Anchorage)
Epicentre
60.463° N, 152.265° 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
KalifornskyAlaska, United States · pop. 7,85054 kmINot felt
KenaiAlaska, United States · pop. 7,66156 kmINot felt
AnchorageAlaska, United States · pop. 289,600153 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 Survey2.6 ml109.1 km60.46° N, 152.26° W–Automatic

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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 120 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 109 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M2.6 releases about 32× the energy of M1.6, and its waves are about 10× taller on a seismogram. Energy: 120 kg of TNT vs 4 kg of TNT.

Each square is the energy of one M1.6. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

4 later earthquakes within 30 km; the largest was M2.8 20 h ago. 5 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
30.93-1.08
54.861.7115
90.691.891
113.502.890
  1. 2.848 km W of Kenai, Alaska, United States09-28 03:48
  2. 1.861 km W of Kalifornsky, Alaska, United States09-27 04:59
  3. 1.782 km W of Kalifornsky, Alaska, United States09-25 17:09
  4. -1.076 km W of Kalifornsky, Alaska, United States09-24 17:13

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

How strong was the shaking where you were?

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Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 1 reports: add yours at USGS.

Event id aka2026swgkjb. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026swgkjb). Cite as: SeismoAtlas, “M2.6 earthquake 54 km W of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026swgkjb-m2-6-earthquake-54-km-w-of-kalifornsky-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026swgkjb. SeismoAtlas is not an official warning service.