M1.3 earthquake 63 km W of Kenai, Alaska, United States
A magnitude 1.3 earthquake struck 63 km W of Kenai, Alaska, United States at 12:10 local time (20:10 UTC) on 28 Sept 2026, at a depth of 89 km, according to USGS.
Data: USGS · updated 2026-09-30 06:34 UTC · reviewed
- Magnitude
- 1.3micro
local magnitude (Richter) (ml) - Depth
- 88.8 km
- Status
- Reviewed
- Origin time
- 2026-09-28 20:10:26 UTC
- Local: 28 Sept 2026, 12:10:26 (America/Anchorage)
- Epicentre
- 60.611° N, 152.399° 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 |
|---|---|---|
| KenaiAlaska, United States · pop. 7,661 | 63 km | INot felt |
| KalifornskyAlaska, United States · pop. 7,850 | 64 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 | 1.3 ml | 88.8 km | 60.61° N, 152.40° 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 1 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 89 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M1.3 releases about 2.8× the energy of M1.0, and its waves are about 2× taller on a seismogram. Energy: 1 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
13 later earthquakes within 30 km; the largest was M1.5 4 days ago. 14 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.3
13 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 0.32 | -1.1 | 7 |
| 0.74 | 1.5 | 96 |
| 2.61 | 1.4 | 93 |
| 27.06 | 1.5 | 105 |
| 29.37 | -0.4 | 6 |
| 30.60 | -0.5 | 2 |
| 45.09 | -0.8 | 0 |
| 66.75 | -0.9 | 2 |
| 72.75 | -0.7 | 3 |
| 78.50 | 0.0 | 3 |
| 80.00 | -0.9 | 3 |
| 82.30 | 0.5 | 4 |
| 98.99 | 1.3 | 131 |
- 1.569 km W of Kalifornsky, Alaska, United States09-28 20:54
- 1.562 km WNW of Kenai, Alaska, United States09-29 23:14
- 1.447 km WNW of Kenai, Alaska, United States09-28 22:47
- 1.379 km WNW of Kenai, Alaska, United States10-02 23:10
- 0.585 km W of Kalifornsky, Alaska, United States10-02 06:28
- 0.080 km W of Kenai, Alaska, United States10-02 02:40
- -0.481 km W of Kalifornsky, Alaska, United States09-30 01:32
- -0.581 km W of Kalifornsky, Alaska, United States09-30 02:46
- -0.778 km W of Kalifornsky, Alaska, United States10-01 20:55
- -0.882 km W of Kalifornsky, Alaska, United States09-30 17:15
- -0.983 km W of Kalifornsky, Alaska, United States10-01 14:55
- -0.980 km W of Kalifornsky, Alaska, United States10-02 04:10
- -1.184 km W of Kalifornsky, Alaska, United States09-28 20:29
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 aka2026tgggzm. First recorded here 30 Sept 2026, 07:32:17 UTC. Solutions: USGS · AK (usgs:aka2026tgggzm). Cite as: SeismoAtlas, “M1.3 earthquake 63 km W of Kenai, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tgggzm-m1-3-earthquake-63-km-w-of-kenai-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026tgggzm. SeismoAtlas is not an official warning service.