Miyake event

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What Wikipedia says

A Miyake event is an observed sharp enhancement of the production of cosmogenic isotopes by cosmic rays. It can be marked by a spike in the concentration of radioactive carbon isotope 14C in tree rings, as well as 10Be and 36Cl in ice cores, which are all independently dated.

Excerpt from the Wikipedia article “Miyake event”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Miyake, Fusa; Hakozaki, Masataka; Kimura, Katsuhiko; Tokanai, Fuyuki; Nakamura, Toshio; Takeyama, Mirei; Moriya, Toru., CC BY 4.0, via Wikimedia Commons.