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Multiradionuclide evidence for an extreme solar proton event around 2,610 B.P. (∼660 BC).
O'Hare P, Mekhaldi F, Adolphi F, Raisbeck G, Aldahan A, Anderberg E, Beer J, Christl M, Fahrni S, Synal HA, Park J, Possnert G, Southon J, Bard E; ASTER Team; Muscheler R. O'Hare P, et al. Proc Natl Acad Sci U S A. 2019 Mar 26;116(13):5961-5966. doi: 10.1073/pnas.1815725116. Epub 2019 Mar 11. Proc Natl Acad Sci U S A. 2019. PMID: 30858311 Free PMC article.