What is Japan’s rare ‘megaquake’ warning?
- Posted on April 21, 2026
- By CNN
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- 1 min read
What is Japan’s rare ‘megaquake’ warning?
After a powerful 7.4 quake hit off Japan’s northeast coast on Monday, officials issued a rare advisory—the risk of a megaquake has ticked up in the coming week. CNN’s Hanako Montgomery explains what this means for one of the world’s most earthquake-prone countries.
