Extreme solar energetic particle events, known as Miyake events, are rare phenomena observed in short radiocarbon variations in tree rings during the BCE. We shall present results of recent measurements in an arctic tree (664–663 BCE). Using a box carbon cycle model and Bayesian statistics, we calculated the radiocarbon production rate during the event that is 3.2–4.8 times higher than the average solar modulation, and comparable to the 774–775 CE Miyake solar-proton event. We caution about using the event’s pronounced signature for precise single- year-dating.

Na stretnutie s vami sa tešia
Staníček a prof. Povinec, iniciátor tohto seminára