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7.7 Magnitude Earthquake Hits Japan, Tsunami Warnings Issued

4/22/2026

48 9 Full Breakdown

Summary

Story summary

A magnitude 7.7 earthquake struck off northeastern Japan on April 20, 2026, triggering tsunami warnings.
The Japan Meteorological Agency initially warned waves up to three meters, then downgraded to advisories.
Prime Minister Sanae Takaichi established a crisis team and urged residents to evacuate to higher ground.
Authorities reported minor injuries and no significant damage, and noted a 1% chance of magnitude 8 or higher in the following week.

History

Historical Context

The Great Kanto Earthquake struck Japan on September 1, 1923, killing over 140,000 people and leading to widespread devastation in Tokyo and Yokohama. In the chaos, vigilante groups, encouraged by local authorities, targeted ethnic Koreans, resulting in the Kanto Massacre, where an estimated 6,000 were killed. This historical trauma underscores Japan's ongoing struggle with disaster management and societal vulnerability to natural calamities.

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Story summary

A magnitude 7.7 earthquake struck off northeastern Japan on April 20, 2026, triggering tsunami warnings.
The Japan Meteorological Agency initially warned waves up to three meters, then downgraded to advisories.
Prime Minister Sanae Takaichi established a crisis team and urged residents to evacuate to higher ground.
Authorities reported minor injuries and no significant damage, and noted a 1% chance of magnitude 8 or higher in the following week.

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