M1.9 earthquake 53 km W of Kalifornsky, Alaska, United States
A magnitude 1.9 earthquake struck 53 km W of Kalifornsky, Alaska, United States at 19:21 local time (03:21 UTC) on 27 Sept 2026, at a depth of 90 km, according to USGS.
Data: USGS · updated 2026-09-29 06:06 UTC · reviewed
- Magnitude
- 1.9micro
local magnitude (Richter) (ml) - Depth
- 89.7 km
- Status
- Reviewed
- Origin time
- 2026-09-28 03:21:25 UTC
- Local: 27 Sept 2026, 19:21:25 (America/Anchorage)
- Epicentre
- 60.486° N, 152.244° 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 | 53 km | INot felt |
| KenaiAlaska, United States · pop. 7,661 | 54 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 151 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 ml | 89.7 km | 60.49° N, 152.24° W | – | Reviewed |
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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 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 90 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
25 later earthquakes within 30 km; the largest was M2.8 9 days ago. 9 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.9
25 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 0.44 | 2.8 | 91 |
| 16.82 | 1.3 | 89 |
| 17.56 | 1.5 | 96 |
| 43.88 | 1.5 | 105 |
| 46.19 | -0.4 | 6 |
| 47.42 | -0.5 | 2 |
| 61.90 | -0.8 | 0 |
| 71.04 | 1.3 | 97 |
| 89.57 | -0.7 | 3 |
| 96.81 | -0.9 | 3 |
| 101.73 | 1.4 | 80 |
| 134.28 | -0.3 | 11 |
| 141.66 | -0.8 | 4 |
| 148.78 | 1.6 | 87 |
| 149.21 | -1.0 | 1 |
| 155.02 | -0.9 | 2 |
| 164.49 | -0.9 | 2 |
| 194.20 | -0.5 | 14 |
| 195.09 | -0.7 | -2 |
| 198.40 | 2.1 | 110 |
| 199.84 | 0.9 | 97 |
| 202.38 | 1.1 | 89 |
| 207.10 | -0.8 | -2 |
| 211.85 | 0.3 | 12 |
| 226.72 | 1.7 | 83 |
- 2.848 km W of Kenai, Alaska, United States09-28 03:48
- 2.153 km WNW of Kalifornsky, Alaska, United States10-06 09:45
- 1.743 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
- 0.965 km W of Kalifornsky, Alaska, United States10-06 11:12
- 0.373 km W of Kalifornsky, Alaska, United States10-06 23:12
- -0.372 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
- -0.782 km W of Kalifornsky, Alaska, United States10-06 06:26
- -0.882 km W of Kalifornsky, Alaska, United States09-30 17:15
- -0.878 km W of Kalifornsky, Alaska, United States10-06 18:27
- -0.875 km W of Kalifornsky, Alaska, United States10-04 01:00
- -0.979 km W of Kalifornsky, Alaska, United States10-04 23:50
- -0.980 km W of Kalifornsky, Alaska, United States10-02 04:10
- -0.979 km W of Kalifornsky, Alaska, United States10-04 14:22
- -1.081 km W of Kalifornsky, Alaska, United States10-04 08:34
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.
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Event id aka2026teynpj. First recorded here 29 Sept 2026, 06:32:14 UTC. Solutions: USGS · AK (usgs:aka2026teynpj). Cite as: SeismoAtlas, “M1.9 earthquake 53 km W of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026teynpj-m1-9-earthquake-53-km-w-of-kalifornsky-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026teynpj. SeismoAtlas is not an official warning service.