Des arbres anciens révèlent une tempête solaire médiévale survenue en 1200

14 mai 2026

Rapporté par l'IA

Des chercheurs ont découvert des preuves d'un puissant événement à protons solaires ayant frappé la Terre vers 1200, grâce à l'analyse des pics de carbone 14 dans des arbres japonais anciens et au recoupement avec des archives médiévales faisant état d'aurores boréales rouges.

L'étude, menée par des scientifiques de l'Institut des sciences et technologies d'Okinawa, a identifié que cet événement d'intensité modérée s'est produit entre l'hiver 1200 et le printemps 1201. Les travaux ont combiné des mesures ultra-précises de carbone 14 effectuées sur des arbres asunaro enfouis dans la préfecture d'Aomori avec des récits historiques, notamment des descriptions de lumières rouges dans le ciel du nord provenant d'un journal intime japonais et des rapports similaires en provenance de Chine.

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jeudi 14 mai 2026 11h51