The reason was powerful geomagnetic storm resulting from strong solar flares.
Japanese scientists explained the nature of atmospheric phenomena that occurred over the territory of medieval China and Japan in the X-XIII centuries. The reason was powerful geomagnetic storm resulting from strong solar flares. Article scientists published in the journal Space Weather.
The earliest known evidence of phenomena that supposedly accompany geomagnetic storms, is the description of the Japanese poet Fujiwara Teika, dated February 21-23 1204. He reported arose in the sky, a mysterious “red and white vapors”, which, according to experts, are the Aurora. At the same time, the Chinese observed a large number of sunspots, indicating increased activity of the Sun. The researchers tested whether there are similar references in earlier historical documents.
Scientists have found that in China and Japan, the auroras were also observed during the song dynasty (960-1279). Many of the atmospheric phenomena recur at intervals of 27 days, which corresponds to the period of revolution of the Sun around its axis. While radiocarbon analysis of tree rings showed that the peak of activity at solar maxima.
The researchers came to the conclusion that the Aurora Borealis, was in Asia about a thousand years ago, due to a strong multiple coronal mass ejections from the same region of the Sun. According to experts, a similar geomagnetic storm currently can lead to interruptions in the supply of electricity that occurred, for example, during the Carrington Event in 1859. Then, in the US and Europe went down the telegraphs, and auroras were observed around the world.
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