Nuclear Risk Watch · Facility Report
Higashidōri Nuclear Power Plant
Japan · Tohoku Electric Power · nuclear power plant · operational · 1,100 MW installed
41.188, 141.390 · generated 2026-09-12 06:12:17 UTC
Current external hazard exposure
LOW · 1.7/100
Earthquake 142 km from Higashidōri Nuclear Power Plant, 6 d ago (severity 18%, distance factor 0.39, recency 0.25) → exposure LOW (1.7/100).
Baseline: this exposure is at or above 2% of the 819 observations recorded for this facility since 2026-06-14 · highest recorded 37.5/100.
Facility impact: no operational effect has been confirmed in the public sources reviewed.Exposure measures external hazard conditions near the site; it is not an assessment of plant engineering safety.
Nearby active hazards (in range)
| Type | Source | When (UTC) | Distance |
|---|---|---|---|
| EARTHQUAKE M4.9 | USGS | 2026-09-06 05:15 | 142 km |
Recent exposure history
- 2026-09-12 05:01 · LOW 1.7
- 2026-09-12 01:01 · LOW 1.8
- 2026-09-11 22:01 · LOW 2.0
- 2026-09-11 17:01 · LOW 2.1
- 2026-09-11 08:01 · LOW 2.3
- 2026-09-11 03:01 · LOW 2.4
- 2026-09-10 23:01 · LOW 2.5
- 2026-09-10 19:01 · LOW 2.6
How this score is calculated
External hazard exposure (0–100) combines four factors: hazard type, severity, proximity to the site and recency — higher when a serious hazard is close and recent. It does not incorporate facility vulnerability or consequence. Full methodology.
LOW 0–20MODERATE 20–40ELEVATED 40–60HIGH 60–80SEVERE 80–100