Tokyo
Three plates meet beneath the Kanto plain, so Tokyo is shaken both by shallow crustal faults and by deep slab events; the Sagami Trough produced the 1923 Great Kanto earthquake and is the source the capital's preparedness planning is built around.
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
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Living within 180 km of the city centre
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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) · 22
Frequently Asked Questions (FAQ)
Verified scientific, operational, and emergency protocols