Loading data for JapanLining up the latest figures for all 47 prefecturesPulling together quakes, weather, and live camerasBuilding the map layers
Cumulative earthquakes recording seismic intensity 5-lower or above over the last 30 years (a composite metric that includes observation-network density).
Source: JMA — Seismic Intensity Database + Nippon Pulse earthquake observation archive
▲ The top 5 prefectures are tinted sky, ▼ the bottom 5 amber — just enough colour to follow the two ends of the “desirable direction.”
To see the same metric on the map, pick it from the map on the home page.