Solar superstorm of AD 774 recorded subannually by Arctic tree rings

Tree rings retain information of sudden variations of ancient radiocarbon (14C) content, however the origin and exact timing of these events often remain uncertain. Here, the authors analyze a set of Arctic tree rings and link a rapid increase in 14C to a solar event that occurred during the spring...

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Bibliographic Details
Main Authors: J. Uusitalo, L. Arppe, T. Hackman, S. Helama, G. Kovaltsov, K. Mielikäinen, H. Mäkinen, P. Nöjd, V. Palonen, I. Usoskin, M. Oinonen
Format: Article
Language:English
Published: Nature Publishing Group 2018-08-01
Series:Nature Communications
Online Access:https://doi.org/10.1038/s41467-018-05883-1