M2.7 earthquake 44 km WSW of Kalifornsky, Alaska, United States
A magnitude 2.7 earthquake struck 44 km WSW of Kalifornsky, Alaska, United States at 18:29 local time (02:29 UTC) on 20 Sept 2026, at a depth of 78 km, according to USGS.
1 reports to USGS “Did You Feel It?”
Data: USGS · updated 2026-09-28 19:36 UTC · reviewed
- Magnitude
- 2.7micro
local magnitude (Richter) (ml) - Depth
- 78.4 km
- Status
- Reviewed
- Origin time
- 2026-09-21 02:29:56 UTC
- Local: 20 Sept 2026, 18:29:56 (America/Anchorage)
- Epicentre
- 60.312° N, 152.059° 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
| Place | Distance | Est. shaking |
|---|---|---|
| KalifornskyAlaska, United States · pop. 7,850 | 44 km | INot felt |
| KenaiAlaska, United States · pop. 7,661 | 51 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 155 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 | 2.7 ml | 78.4 km | 60.31° N, 152.06° 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 169 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 78 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M2.7 releases about 32× the energy of M1.7, and its waves are about 10× taller on a seismogram. Energy: 169 kg of TNT vs 5 kg of TNT.
Each square is the energy of one M1.7. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
6 later earthquakes within 30 km; the largest was M2.8 21 h ago. 1 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M2.7
6 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 47.34 | 1.6 | 95 |
| 55.80 | 2.6 | 109 |
| 125.75 | 1.9 | 103 |
| 146.49 | 1.8 | 91 |
| 169.30 | 2.8 | 90 |
| 183.43 | 2.6 | 72 |
- 2.848 km W of Kenai, Alaska, United States09-28 03:48
- 2.654 km W of Kalifornsky, Alaska, United States09-23 10:17
- 2.637 km SW of Kalifornsky, Alaska, United States09-28 17:55
- 1.969 km WSW of Kalifornsky, Alaska, United States09-26 08:15
- 1.861 km W of Kalifornsky, Alaska, United States09-27 04:59
- 1.652 km WSW of Kalifornsky, Alaska, United States09-23 01:50
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Event id aka2026srytln. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026srytln). Cite as: SeismoAtlas, “M2.7 earthquake 44 km WSW of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026srytln-m2-7-earthquake-44-km-wsw-of-kalifornsky-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026srytln. SeismoAtlas is not an official warning service.