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
Published in:Nature Communications
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 in Journal/Newspaper
Language:English
Published: Nature Portfolio 2018
Subjects:
Science
Q
Arctic
Online Access:https://doi.org/10.1038/s41467-018-05883-1
https://doaj.org/article/f8b62c47718549669927d2ed53e32ab5
Description
Summary: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 of AD 774.

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