Tokyo & Kanto Plain
The Greater Tokyo metropolitan area of 37+ million people sits atop the complex triple junction of the Pacific, Philippine Sea, and North American/Okhotsk plates. It is vulnerable to deep subduction thrusts as well as catastrophic shallow intraplate ruptures like the 1923 Great Kanto earthquake (M7.9).
Danger Level (72h)
72-hour composite hazard forecast
Recent Quakes (14d)
Recorded in the selected 14d period
Max Magnitude (14d)
Largest earthquake in the selected 14d period
Tectonic Profile
Seismotectonic hazard assessment, structural exposure & historical context
Click to locate on map
--
Living within seismically active radius (~300 km)
--
Mixed construction stock with regional engineering standards
Subduction Zone
Major plate boundary with high strain accumulation
Seismically Stable Period
No significant earthquakes recorded in the selected 14d period.
Seismic Activity
Every recorded earthquake in this area — filter by time range and sort by time or severity.
Regional Volcanism & Monitored Vents
Active vents and Holocene volcanic structures within the monitored boundary (Tokyo & Kanto Plain) · 18