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Video. Did You Know that? a Mascaret, a Big Wave Shook the Seine Until Rouen in the 1940s: Here's What's Left of It.

Summary by franceinfo.fr
It was one of the most spectacular natural shows in Normandy. This Friday, March 20, 2026, on the banks of the Seine, the mascaret was barely observable. 2.50 meters in the 1940s, only a few centimetres today. The phenomenon is disappearing. But why? We explain.

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franceinfo.frfranceinfo.fr
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Video. Did You Know that? a Mascaret, a Big Wave Shook the Seine Until Rouen in the 1940s: Here's What's Left of It.

It was one of the most spectacular natural shows in Normandy. This Friday, March 20, 2026, on the banks of the Seine, the mascaret was barely observable. 2.50 meters in the 1940s, only a few centimetres today. The phenomenon is disappearing. But why? We explain.

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franceinfo.fr broke the news in on Saturday, March 21, 2026.
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