Reported by EMSC 24 days ago.
It is the 2nd strongest of the 7 detections recorded within 20 km of this point since 8 March 2026. The last comparable one was on 18 May 2026. One more was recorded here in the fortnight before it.
What the source measured
EMSC reported: OFF EAST COAST OF HONSHU, JAPAN
Nearby, since 8 March 2026
- August 6, 2026 · score 5 · 6.7 km
- August 6, 2026 · score 5 · 6.7 km
- August 28, 2026 · score 6 · 15.2 km
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 19 out of 100, at 63 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | medium |
| Calamity Score (ours) | 19 / 100 |
| Our confidence | 63% |
| Coordinates | 39.5829, 143.6408 |
| Nearest City | Yamada (146 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-06T17:43:36.862Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260806_0000242 |
Score Breakdown
Technical Details
| Mag | 5.4 |
| Depth | -10 |
| MagType | mw |
| Region | OFF EAST COAST OF HONSHU, JAPAN |
| Auth | NEIC |
| SourceId | 2038642 |
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.
Calamity.live data shows a earthquake event with CalamityScore 19/100, in Off East Coast of Honshu, Japan (Japan), based on data from emsc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.