Ancient trees reveal medieval solar storm from 1200 ce

14. maj 2026

Rapporteret af AI

Researchers have uncovered evidence of a powerful solar proton event that struck Earth around 1200 ce by analyzing carbon-14 spikes in ancient Japanese trees and cross-referencing medieval records of red auroras.

The study, led by scientists at the Okinawa Institute of Science and Technology, identified the sub-extreme event as occurring between the winter of 1200 ce and the spring of 1201 ce. It combined ultra-precise carbon-14 measurements from buried asunaro trees in Aomori Prefecture with historical accounts, including descriptions of red lights in the northern sky from a Japanese diary and similar reports from China.

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torsdag d. 14. maj 2026, 11.51