M4.8 earthquake 91 km E of Yuzhno-Kurilsk, Sakhalin Oblast, Russia
A magnitude 4.8 earthquake struck 91 km E of Yuzhno-Kurilsk, Sakhalin Oblast, Russia at 04:21 local time (17:21 UTC) on 23 Oct 2026, at a depth of 70 km, according to JMA, USGS and GFZ. The solution is preliminary and may be revised.
Reported by 3 agencies
Data: JMA, USGS, GFZ · updated 2026-11-08 18:00 UTC · automatic solution
- Magnitude
- 4.8light
JMA magnitude (Mj) - Depth
- 70 km
- Status
- Automatic
- Origin time
- 2026-10-22 17:21:00 UTC
- Local: 23 Oct 2026, 04:21:00 (Asia/Sakhalin)
- Epicentre
- 44.100° N, 147.000° E
Circles show this event and others within 32 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 |
|---|---|---|
| Yuzhno-KurilskSakhalin Oblast, Russia · pop. 7,777 | 91 km | IIWeak |
| NemuroHokkaido, Japan · pop. 31,223 | 144 km | IIWeak |
| AsahikawaHokkaido, Japan · pop. 333,530 | 373 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. Likely felt out to about 75 km.
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 JMA.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| JMAheadlineJMA via Japan Meteorological Agency | 4.8 Mj | 70 km | 44.10° N, 147.00° E | – | Automatic |
| USGSUSGS NEIC via U.S. Geological Survey | 4.8 mb | 78.2 km | 44.12° N, 147.01° E | +27.3 s | Reviewed · 1 revision |
| GFZGFZ via GEOFON, GFZ Helmholtz Centre for Geosciences | 4.9 mbwas 5.0 | 87.2 km | 44.25° N, 146.87° E | +29.3 s | Automatic · 2 revisions |
How big was it?
Widely felt near the epicentre: rattling windows and objects. Significant damage is unlikely.
It released roughly the energy of 239 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.
M4.8 releases about 32× the energy of M3.8, and its waves are about 10× taller on a seismogram. Energy: 239 t of TNT vs 7.6 t of TNT.
Each square is the energy of one M3.8. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
No later earthquakes have been recorded within 32 km so far. Aftershock rates usually fall off roughly in proportion to 1/time.
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports close 14 days after an earthquake.
Reports on SeismoAtlas
No reports yet.
Event id jma20261023022148. First recorded here 22 Oct 2026, 17:28:22 UTC. Solutions: JMA (jma:20261023022148); USGS (usgs:us6000u45f); GFZ (geofon:gfz2026usmh). Cite as: SeismoAtlas, “M4.8 earthquake 91 km E of Yuzhno-Kurilsk, Sakhalin Oblast, Russia”, https://seismoatlas.com/earthquake/jma20261023022148-m4-8-earthquake-91-km-e-of-yuzhno-kurilsk-sakhalin-oblast-russia, data from JMA, USGS, GFZ.
JSON: /api/v1/events/jma20261023022148. SeismoAtlas is not an official warning service.