論文

査読有り
2018年9月

A great space weather event in February 1730

ASTRONOMY & ASTROPHYSICS
  • Hisashi Hayakawa
  • ,
  • Yusuke Ebihara
  • ,
  • Jose M. Vaquero
  • ,
  • Kentaro Hattori
  • ,
  • Victor M. S. Carrasco
  • ,
  • Maria de la Cruz Gallego
  • ,
  • Satoshi Hayakawa
  • ,
  • Yoshikazu Watanabe
  • ,
  • Kiyomi Iwahashi
  • ,
  • Harufumi Tamazawa
  • ,
  • Akito D. Kawamura
  • ,
  • Hiroaki Isobe

616
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1051/0004-6361/201832735
出版者・発行元
EDP SCIENCES S A

Aims. Historical records provide evidence of extreme magnetic storms with equatorward auroral extensions before the epoch of systematic magnetic observations. One significant magnetic storm occurred on February 15, 1730. We scale this magnetic storm with auroral extension and contextualise it based on contemporary solar activity.Methods. We examined historical records in East Asia and computed the magnetic latitude (MLAT) of observational sites to scale magnetic storms. We also compared them with auroral records in Southern Europe. We examined contemporary sunspot observations to reconstruct detailed solar activity between 1729 and 1731.Results. We show 29 auroral records in East Asian historical documents and 37 sunspot observations.Conclusions. These records show that the auroral displays were visible at least down to 25.8 degrees MLAT throughout East Asia. In comparison with contemporary European records, we show that the boundary of the auroral display closest to the equator surpassed 45.1 degrees MLAT and possibly came down to 31.5 degrees MLAT in its maximum phase, with considerable brightness. Contemporary sunspot records show an active phase in the first half of 1730 during the declining phase of the solar cycle. This magnetic storm was at least as intense as the magnetic storm in 1989, but less intense than the Carrington event.

Web of Science ® 被引用回数 : 20

リンク情報
DOI
https://doi.org/10.1051/0004-6361/201832735
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000444018700002&DestApp=WOS_CPL
共同研究・競争的資金等の研究課題
歴史文献を用いた過去の太陽活動の研究
ID情報
  • DOI : 10.1051/0004-6361/201832735
  • ISSN : 1432-0746
  • Web of Science ID : WOS:000444018700002
  • 共同研究・競争的資金等の研究課題の業績ID : 30767564

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