Mysterious 8th-century cosmic blast

Mysterious 8th-century cosmic blast

Radioactive carbon-14 levels measure much higher than normal.

Auroras occur when bursts of charged particles hit Earth's atmosphere — but there is no record of these occurring at the same time as the 14C increase in tree rings. ©NASA

In the late eighth century, Earth was hit by an extremely intense burst of high-energy radiation of unknown cause, say Japanese scientists.

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6 thoughts on “Mysterious 8th-century cosmic blast

  1. If the levels of carbon-14 in the atmosphere is variable rather than constant, wouldn’t it make carbon dating unreliable?

  2. The article notes that an historic record from the time notes what sounds like profoundly increased aurora or something similar, and oddly, a separate source (The Daily Mail citing New Scientist):

    “… the only contemporaneous record is from a 13th-century English chronicler, called Roger of Wendover, who, according to New Scientist, is quoted as saying: ‘In the Year of our Lord 776, fiery and fearful signs were seen in the heavens after sunset; and serpents appeared in Sussex, as if they were sprung out of the ground, to the astonishment of all.’

    Read more:–deep-rings-cedar-trees.html#ixzz1wzWe5oyO

    My take would be a solar flare or flares. If a single one, it would have to have been more powerful than a Carrington Event. Not sure where the snakes came from.

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