M2.6 earthquake 55 km W of Kalifornsky, Alaska, United States
A magnitude 2.6 earthquake struck 55 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.
1 reports to USGS “Did You Feel It?”
Data: USGS · updated 2026-10-07 08:43 UTC · reviewed
- Magnitude
- 2.6micro
local magnitude (Richter) (ml) - Depth
- 109.2 km
- Status
- Reviewed
- Origin time
- 2026-09-23 10:17:51 UTC
- Local: 23 Sept 2026, 02:17:51 (America/Anchorage)
- Epicentre
- 60.458° N, 152.283° 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
| Place | Distance | Est. shaking |
|---|---|---|
| KalifornskyAlaska, United States · pop. 7,850 | 55 km | INot felt |
| KenaiAlaska, United States · pop. 7,661 | 57 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 154 km | INot 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, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey | 2.6 ml | 109.2 km | 60.46° N, 152.28° W | – | Reviewed · 1 revision |
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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
36 later earthquakes within 30 km; the largest was M3.0 2 days ago. 5 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M2.6
36 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 30.93 | -1.0 | 8 |
| 34.66 | 1.0 | 114 |
| 52.80 | 1.7 | 88 |
| 54.86 | 1.9 | 113 |
| 69.83 | 1.7 | 86 |
| 90.69 | 1.8 | 91 |
| 98.15 | -0.2 | -1 |
| 113.06 | 1.9 | 90 |
| 113.50 | 2.8 | 91 |
| 129.88 | 1.3 | 89 |
| 130.20 | -1.1 | 7 |
| 130.62 | 1.5 | 96 |
| 156.94 | 1.5 | 105 |
| 159.25 | -0.4 | 6 |
| 160.48 | -0.5 | 2 |
| 174.96 | -0.8 | 0 |
| 184.10 | 1.3 | 97 |
| 196.63 | -0.9 | 2 |
| 202.63 | -0.7 | 3 |
| 209.87 | -0.9 | 3 |
| 214.79 | 1.4 | 80 |
| 247.34 | -0.3 | 11 |
| 254.72 | -0.8 | 4 |
| 261.84 | 1.6 | 87 |
| 262.27 | -1.0 | 1 |
| 268.08 | -0.9 | 2 |
| 277.55 | -0.9 | 2 |
| 288.81 | 3.0 | 105 |
| 307.26 | -0.5 | 14 |
| 308.15 | -0.7 | -2 |
| 311.46 | 2.1 | 110 |
| 312.90 | 0.9 | 97 |
| 315.44 | 1.1 | 89 |
| 320.16 | -0.8 | -2 |
| 324.91 | 0.3 | 12 |
| 339.78 | 1.7 | 83 |
- 3.069 km WSW of Kalifornsky, Alaska, United States10-05 11:06
- 2.848 km W of Kenai, Alaska, United States09-28 03:48
- 2.153 km WNW of Kalifornsky, Alaska, United States10-06 09:45
- 1.982 km W of Kalifornsky, Alaska, United States09-25 17:09
- 1.953 km W of Kalifornsky, Alaska, United States09-28 03:21
- 1.861 km W of Kalifornsky, Alaska, United States09-27 04:59
- 1.758 km WSW of Kalifornsky, Alaska, United States09-25 15:06
- 1.745 km WSW of Kalifornsky, Alaska, United States09-26 08:07
- 1.743 km W of Kalifornsky, Alaska, United States10-07 14:04
- 1.640 km WSW of Kalifornsky, Alaska, United States10-04 08:08
- 1.569 km W of Kalifornsky, Alaska, United States09-28 20:54
- 1.562 km WNW of Kenai, Alaska, United States09-29 23:14
- 1.434 km W of Kalifornsky, Alaska, United States10-02 09:05
- 1.363 km W of Kenai, Alaska, United States09-28 20:10
- 1.372 km WSW of Kalifornsky, Alaska, United States10-01 02:23
- 1.160 km W of Kenai, Alaska, United States10-06 13:44
- 1.077 km W of Kalifornsky, Alaska, United States09-24 20:57
- 0.965 km W of Kalifornsky, Alaska, United States10-06 11:12
- 0.373 km W of Kalifornsky, Alaska, United States10-06 23:12
- -0.281 km W of Kalifornsky, Alaska, United States09-27 12:26
- -0.372 km W of Kenai, Alaska, United States10-03 17:38
- -0.481 km W of Kalifornsky, Alaska, United States09-30 01:32
- -0.580 km W of Kalifornsky, Alaska, United States10-06 05:33
- -0.581 km W of Kalifornsky, Alaska, United States09-30 02:46
- -0.778 km W of Kalifornsky, Alaska, United States10-01 20:55
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.
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Event id aka2026swgkjb. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026swgkjb). Cite as: SeismoAtlas, “M2.6 earthquake 55 km W of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026swgkjb-m2-6-earthquake-55-km-w-of-kalifornsky-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026swgkjb. SeismoAtlas is not an official warning service.