Reported by EMSC today.
It is one of only 4 we have recorded within 20 km of this point since 11 June 2026. The last comparable one was on 11 August 2026.
What the source measured
EMSC reported: HOKKAIDO, JAPAN REGION
EMSC recorded magnitude 4.8 at a depth of -50 km.
The seismic region given by the source is HOKKAIDO, JAPAN REGION.
This is the highest magnitude we have recorded at this point, over 12 readings since 1 September 2026 — the previous range was 4.3 to 4.8.
Nearby, since 11 June 2026
- August 11, 2026 · score 7 · 3.6 km
- June 11, 2026 · score 2 · 10.2 km
- August 11, 2026 · score 5 · 13.3 km
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 7 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 7 / 100 |
| Our confidence | 65% |
| Coordinates | 41.6000, 142.1000 |
| Nearest City | Mutsu (81 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-01T19:21:30.000Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260901_0000294 |
Score Breakdown
Technical Details
| Mag | 4.8 |
| Depth | -50 |
| MagType | mb |
| Region | HOKKAIDO, JAPAN REGION |
| Auth | JMA |
| SourceId | 2054238 |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a earthquake event with CalamityScore 7/100, in Hokkaido, Japan Region (Japan), based on data from emsc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.