M4.3 earthquake 32 km SE of Kalifornsky, Alaska, United States
A magnitude 4.3 earthquake struck 32 km SE of Kalifornsky, Alaska, United States at 02:30 local time (11:30 UTC) on 1 Nov 2026, at a depth of 70 km, according to USGS.
revised from M4.5 · 27 reports to USGS “Did You Feel It?”
Data: USGS · updated 2026-11-01 11:42 UTC · reviewed
- Magnitude
- 4.3light
local magnitude (Richter) (ml)
revised from 4.5 - Depth
- 70.4 km
- Status
- Reviewed
- Origin time
- 2026-11-01 11:30:21 UTC
- Local: 1 Nov 2026, 02:30:21 (America/Anchorage)
- Epicentre
- 60.198° N, 150.932° 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 | 32 km | IIWeak |
| SterlingAlaska, United States · pop. 5,617 | 39 km | IIWeak |
| AnchorageAlaska, United States · pop. 289,600 | 127 km | INot felt |
| Eagle RiverAlaska, United States · pop. 24,793 | 145 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 | 4.3 mlwas 4.5 | 70.4 km | 60.20° N, 150.93° W | – | Reviewed · 4 revisions |
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How big was it?
Widely felt near the epicentre: rattling windows and objects. Significant damage is unlikely.
It released roughly the energy of 43 t 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 70 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M4.3 releases about 32× the energy of M3.3, and its waves are about 10× taller on a seismogram. Energy: 43 t of TNT vs 1.3 t of TNT.
Each square is the energy of one M3.3. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
15 later earthquakes within 30 km; the largest was M3.1 17 h ago. 7 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M4.3
15 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 7.42 | 1.9 | 55 |
| 88.22 | 2.6 | 64 |
| 88.84 | 3.0 | 65 |
| 92.67 | 1.9 | 63 |
| 102.47 | 2.0 | 48 |
| 123.51 | 1.9 | 55 |
| 128.61 | 1.8 | 50 |
| 134.78 | 2.6 | 62 |
| 154.07 | 1.8 | 64 |
| 154.59 | 1.9 | 31 |
| 169.69 | 1.7 | 46 |
| 171.60 | 2.0 | 53 |
| 174.12 | 1.7 | 60 |
| 256.22 | 3.1 | 61 |
| 265.67 | 2.5 | 68 |
- 3.120 km SSE of Kalifornsky, Alaska, United States11-12 03:43
- 3.026 km S of Sterling, Alaska, United States11-05 04:20
- 2.627 km S of Sterling, Alaska, United States11-05 03:43
- 2.610 km S of Kalifornsky, Alaska, United States11-07 02:17
- 2.530 km SE of Kalifornsky, Alaska, United States11-12 13:10
- 2.035 km SSE of Sterling, Alaska, United States11-05 17:58
- 2.019 km SSE of Kalifornsky, Alaska, United States11-08 15:06
- 1.918 km S of Sterling, Alaska, United States11-01 18:55
- 1.920 km SSE of Kalifornsky, Alaska, United States11-05 08:10
- 1.910 km ESE of Kalifornsky, Alaska, United States11-06 15:01
- 1.911 km SW of Sterling, Alaska, United States11-07 22:05
- 1.817 km ESE of Kalifornsky, Alaska, United States11-06 20:07
- 1.810 km SSW of Kalifornsky, Alaska, United States11-07 21:34
- 1.717 km SW of Sterling, Alaska, United States11-08 13:11
- 1.724 km SSE of Kalifornsky, Alaska, United States11-08 17:37
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
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Event id aka2026vqjriv. First recorded here 1 Nov 2026, 11:32:00 UTC. Solutions: USGS · AK (usgs:aka2026vqjriv). Cite as: SeismoAtlas, “M4.3 earthquake 32 km SE of Kalifornsky, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026vqjriv-m4-3-earthquake-32-km-se-of-kalifornsky-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026vqjriv. SeismoAtlas is not an official warning service.