4 ms·
https://en.wikipedia.org/wiki/774–775_carbon-14_spike https://en.wikipedia.org/wiki/774–775_carbon-14_spike > It is known as the Miyake event or the Charlemagn
by legulere 4y ago
https://en.wikipedia.org/wiki/774–775_carbon-14_spike https://en.wikipedia.org/wiki/774–775_carbon-14_spike
> It is known as the Miyake event or the Charlemagne event and it produced the largest and most rapid rise in carbon-14 ever recorded. [...] "This year also appeared in the heavens a red crucifix, after sunset;" [...] The "red crucifix" recorded by the Anglo-Saxon Chronicle has been variously hypothesised to have been a supernova or the aurora borealis