M1.9 earthquake 82 km W of Kalifornsky, Alaska, United States
A magnitude 1.9 earthquake struck 82 km W of Kalifornsky, Alaska, United States at 09:09 local time (17:09 UTC) on 25 Sept 2026, at a depth of 113 km, according to USGS.
revised from M1.7
Data: USGS · updated 2026-10-02 01:22 UTC · reviewed
- Magnitude
- 1.9micro
local magnitude (Richter) (ml)
revised from 1.7 - Depth
- 112.7 km
- Status
- Reviewed
- Origin time
- 2026-09-25 17:09:13 UTC
- Local: 25 Sept 2026, 09:09:13 (America/Anchorage)
- Epicentre
- 60.382° N, 152.784° W
Advertisement
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 | 82 km | INot felt |
| KenaiAlaska, United States · pop. 7,661 | 86 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 182 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 | 1.9 mlwas 1.7 | 112.7 km | 60.38° N, 152.78° W | – | Reviewed · 1 revision |
Advertisement
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 11 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 113 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M1.9 releases about 22× the energy of M1.0, and its waves are about 7.9× taller on a seismogram. Energy: 11 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
36 later earthquakes within 30 km; the largest was M3.0 2 days ago. 11 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.9
36 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 16.58 | 2.3 | 117 |
| 17.89 | 2.0 | 134 |
| 35.83 | 1.8 | 91 |
| 43.29 | -0.2 | -1 |
| 75.34 | -1.1 | 7 |
| 75.76 | 1.5 | 96 |
| 86.68 | 1.4 | 102 |
| 94.25 | 1.0 | 68 |
| 104.39 | -0.4 | 6 |
| 105.62 | -0.5 | 2 |
| 120.11 | -0.8 | 0 |
| 127.30 | 2.1 | 106 |
| 129.24 | 1.3 | 97 |
| 134.55 | 1.9 | 132 |
| 141.77 | -0.9 | 2 |
| 147.77 | -0.7 | 3 |
| 155.02 | -0.9 | 3 |
| 155.38 | 1.7 | 125 |
| 157.32 | 0.5 | 4 |
| 199.86 | -0.8 | 4 |
| 200.70 | 2.2 | 128 |
| 207.42 | -1.0 | 1 |
| 210.07 | 1.3 | 160 |
| 212.67 | 0.8 | 5 |
| 213.22 | -0.9 | 2 |
| 222.70 | -0.9 | 2 |
| 233.95 | 3.0 | 105 |
| 235.02 | 2.6 | 125 |
| 252.40 | -0.5 | 14 |
| 253.30 | -0.7 | -2 |
| 253.98 | 0.6 | 42 |
| 256.54 | 0.6 | 100 |
| 258.05 | 0.9 | 97 |
| 265.30 | -0.8 | -2 |
| 270.05 | 0.3 | 12 |
| 276.57 | 1.7 | 106 |
- 3.069 km WSW of Kalifornsky, Alaska, United States10-05 11:06
- 2.695 km NW of Homer, Alaska, United States10-05 12:10
- 2.378 km WSW of Kalifornsky, Alaska, United States09-26 09:43
- 2.2101 km WSW of Kalifornsky, Alaska, United States10-04 01:51
- 2.178 km WSW of Kalifornsky, Alaska, United States10-01 00:27
- 2.0100 km WSW of Kalifornsky, Alaska, United States09-26 11:02
- 1.993 km W of Kalifornsky, Alaska, United States10-01 07:42
- 1.861 km W of Kalifornsky, Alaska, United States09-27 04:59
- 1.783 km WSW of Kalifornsky, Alaska, United States10-02 04:31
- 1.788 km WSW of Kalifornsky, Alaska, United States10-07 05:43
- 1.569 km W of Kalifornsky, Alaska, United States09-28 20:54
- 1.477 km WSW of Kalifornsky, Alaska, United States09-29 07:50
- 1.372 km WSW of Kalifornsky, Alaska, United States10-01 02:23
- 1.368 km WSW of Kalifornsky, Alaska, United States10-04 11:13
- 1.0102 km WSW of Kalifornsky, Alaska, United States09-29 15:24
- 0.965 km W of Kalifornsky, Alaska, United States10-06 11:12
- 0.893 km W of Kalifornsky, Alaska, United States10-04 13:49
- 0.682 km W of Kalifornsky, Alaska, United States10-06 07:08
- 0.677 km WSW of Kalifornsky, Alaska, United States10-06 09:41
- 0.585 km W of Kalifornsky, Alaska, United States10-02 06:28
- 0.373 km W of Kalifornsky, Alaska, United States10-06 23:12
- -0.281 km W of Kalifornsky, Alaska, United States09-27 12:26
- -0.481 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
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
Advertisement
Event id aka2026tamedp. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026tamedp). Cite as: SeismoAtlas, “M1.9 earthquake 82 km W of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tamedp-m1-9-earthquake-82-km-w-of-kalifornsky-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026tamedp. SeismoAtlas is not an official warning service.