61 citations · 353 across the 12 of their papers we have counts for
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physics.hist-ph2016★ 20 cited
Records of sunspot and aurora activity during 581-959 CE in Chinese official histories in the periods of Suí, Táng, and the Five Dynasties and Ten Kingdoms
Harufumi Tamazawa, Akito Davis Kawamura, Hisashi Hayakawa +3
Recent studies of radioisotopes in tree rings or ice cores suggest that extreme space weather events occurred in the pre-telescope age. Observational records of naked-eye sunspots…
physics.hist-ph2016★ 33 cited
The earliest drawings of datable auroras and a two-tail comet from the Syriac Chronicle of Zūqnīn
Hisashi Hayakawa, Yasuyuki Mitsuma, Yasunori Fujiwara +7
People have probably been watching the sky since the beginning of human history. Observers in pre-telescopic ages recorded anomalous events and these astronomical records in the hi…