Scientists Finally Know Why Japan’s 2011 Tsunami Was So Big

In 2011, a magnitude 9.1 earthquake struck off the coast of Japan, unleashing a tsunami up to 40m high - far larger than any model had predicted. It caused untold damages including the Fukushima Daiichi nuclear disaster. For more than a decade, scientists have been trying to explain why. But now, thanks to a record-breaking ocean drilling expedition and a new study published in Science in December 2025, we may finally have the answer…This is the real geological story of why the 2011 tsunami was so devastating - and what it means for predicting the next one.▀▀▀▀▀▀

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