775 AD event
(apparent solar eruption, based upon tree-ring evidence)
The 775 AD event is a solar eruption believed
to have caused a global spike in carbon-14 seen in 774 or 775.
The spike is consistent with a solar event larger than
any recorded.
(solar,event)
Further reading:
https://en.wikipedia.org/wiki/774-775_carbon-14_spike
https://ui.adsabs.harvard.edu/abs/2012Natur.491E...1M/abstract
https://arstechnica.com/science/2012/12/mysterious-radiation-event-of-774-might-be-a-little-less-mysterious/
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