Earthquake in Southeast of Honshu, Japan
Reported by IRIS 174 days ago.
What the source measured
IRIS reported: SOUTHEAST OF HONSHU, JAPAN
Nearby, since 9 March 2026
- March 9, 2026 · score 9 · 0.0 km
How we know
One source: IRIS. Not yet confirmed by a second, independent source.
Our own score for this event is 8 out of 100, at 60 % 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) | 8 / 100 |
| Our confidence | 60% |
| Coordinates | 30.8003, 142.7860 |
| Nearest City | Katsuura (536 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-09T06:38:59.000Z |
| Source | https://ds.iris.edu/ds/nodes/dmc/tools/event/12080032 |
Score Breakdown
Technical Details
| Mag | 4.9 |
| Depth | 10 |
| Region | SOUTHEAST OF HONSHU, JAPAN |
| Isc Mag | 4.9 |
| MagType | mb |
| Isc Depth | 10 |
| Isc Region | Southeast of Honshu |
| Isc MagType | M |
| MergedSources | [{"id":"isc_645496426","source":"isc","severity":"medium","timestamp":1773038342230,"severityValue":40.32},{"id":"isc_645488007","source":"isc","severity":"low","timestamp":1773038340000,"severityValue":29.400000000000002}] |
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 8/100, in Southeast of Honshu, Japan, based on data from iris. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.