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• 2018.03.28

Hisashi Hayakawa, Harufumi Tamazawa, Akito Davis Kawamura, Hiroaki Isobe (2015),
Records of sunspot and aurora during CE 960-1279 in the Chinese chronicle of the Sòng dynasty,
Earth, Planets and Space, 67:82, doi:10.1186/s40623-015-0250-y

In this study, records of solar and auroral activities from the 10th to 13th centuries were retrieved from the Chinese chronicle of the Sòng dynasty. The accuracy of these records were tested scientifically through comparison with the 14C contents in tree rings during that period. This is important because it is the first step taken to survey and compile records of sunspots and auroras from historical documents of various regions and in different languages (the authors have also published a paper on historical auroral events using records in the Babylonian astronomical diaries in 2016 EPS), with the ultimate goal of creating an online database for use by scientists studying historical/extreme solar/auroral events and long-term changes in solar/auroral activity. Such a unified dataset with records from various locations and in different languages is the first of its kind, and will therefore be of value to the scientific community.

Committee for EPS Young Researcher Award 2017

This award-winning article was a contribution to the special issue of "Extremely Severe Space Weather and Geomagnetically Induced Currents in Regions with Locally Heterogeneous Ground Resistivity."