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1-20 of 24
Authors: Hisashi Hayakawa
Journal Article
An Overview of Sunspot Observations in the Early Maunder Minimum: 1645–1659 Open Access
Monthly Notices of the Royal Astronomical Society, Volume 528, Issue 4, March 2024, Pages 6280–6291, https://doi.org/10.1093/mnras/stad3922
Published: 20 December 2023
Journal Article
Analyses for graphical records for a total solar eclipse in 1230 May: a possible reference for the ‘Medieval Grand Maximum’ Open Access
Monthly Notices of the Royal Astronomical Society, Volume 530, Issue 3, May 2024, Pages 3150–3159, https://doi.org/10.1093/mnras/stad3874
Published: 10 December 2023
Journal Article
Analyses of Equatorward Auroral Extensions during the Extreme Geomagnetic Storm on 15 July 1959 Open Access
Monthly Notices of the Royal Astronomical Society, Volume 527, Issue 3, January 2024, Pages 7298–7305, https://doi.org/10.1093/mnras/stad3556
Published: 17 November 2023
Journal Article
Relationship of peak fluxes of solar radio bursts and X-ray class of solar flares: Application to early great solar flares Open Access
Publications of the Astronomical Society of Japan, Volume 75, Issue 6, December 2023, Pages 1095–1104, https://doi.org/10.1093/pasj/psad058
Published: 29 September 2023
Journal Article
Katsue Misawa's sunspot observations in 1921–1934: a primary reference for the Wolfer–Brunner transition Open Access
Monthly Notices of the Royal Astronomical Society, Volume 532, Issue 4, August 2024, Pages 4289–4303, https://doi.org/10.1093/mnras/stad2791
Published: 14 September 2023
Journal Article
Analyses of historical solar eclipse records in Hokkaido Island in the 18–19th centuries Open Access
Publications of the Astronomical Society of Japan, Volume 74, Issue 6, December 2022, Pages 1275–1286, https://doi.org/10.1093/pasj/psac064
Published: 31 October 2022
Journal Article
Inference of magnetic field during the Dalton minimum: Case study with recorded sunspot areas Free
Publications of the Astronomical Society of Japan, Volume 74, Issue 4, August 2022, Pages 767–776, https://doi.org/10.1093/pasj/psac032
Published: 23 June 2022
Journal Article
The extreme solar and geomagnetic storms on 1940 March 20–25 Open Access
Monthly Notices of the Royal Astronomical Society, Volume 517, Issue 2, December 2022, Pages 1709–1723, https://doi.org/10.1093/mnras/stab3615
Published: 13 December 2021
Journal Article
Analyses of a datable solar eclipse record in Maya Classic period monumental inscriptions Free
Publications of the Astronomical Society of Japan, Volume 73, Issue 6, December 2021, Pages L31–L36, https://doi.org/10.1093/pasj/psab088
Published: 20 October 2021
Journal Article
The extreme space weather events in October 1788 Free
Publications of the Astronomical Society of Japan, Volume 73, Issue 5, October 2021, Pages 1367–1374, https://doi.org/10.1093/pasj/psab079
Published: 18 August 2021
Journal Article
Cometary records revise Eastern Mediterranean chronology around 1240 CE Free
Publications of the Astronomical Society of Japan, Volume 73, Issue 1, February 2021, Pages 197–204, https://doi.org/10.1093/pasj/psaa114
Published: 13 January 2021
Journal Article
Reanalyses of the sunspot observations of Fogelius and Siverus: two ‘long-term’ observers during the Maunder minimum Free
Monthly Notices of the Royal Astronomical Society, Volume 506, Issue 1, September 2021, Pages 650–658, https://doi.org/10.1093/mnras/staa2965
Published: 07 October 2020
Journal Article
Intensity and time series of extreme solar-terrestrial storm in 1946 March Free
Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 4, October 2020, Pages 5507–5517, https://doi.org/10.1093/mnras/staa1508
Published: 02 June 2020
Journal Article
Sunspot observations by Hisako Koyama: 1945–1996 Free
Monthly Notices of the Royal Astronomical Society, Volume 492, Issue 3, March 2020, Pages 4513–4527, https://doi.org/10.1093/mnras/stz3345
Published: 19 December 2019
Journal Article
Occurrence of great magnetic storms on 6–8 March 1582 Free
Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 3, August 2019, Pages 3550–3559, https://doi.org/10.1093/mnras/stz1401
Published: 24 June 2019
Journal Article
The extreme space weather event in September 1909 Free
Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 3, April 2019, Pages 4083–4099, https://doi.org/10.1093/mnras/sty3196
Published: 27 November 2018
Journal Article
Sunspot drawings by Japanese official astronomers in 1749–1750 Free
Publications of the Astronomical Society of Japan, Volume 70, Issue 4, August 2018, 63, https://doi.org/10.1093/pasj/psy066
Published: 11 July 2018
Journal Article
Records of auroral candidates and sunspots in Rikkokushi, chronicles of ancient Japan from early 7th century to 887 Free
Publications of the Astronomical Society of Japan, Volume 69, Issue 6, December 2017, 86, https://doi.org/10.1093/pasj/psx087
Published: 25 October 2017
Journal Article
Records of sunspots and aurora candidates in the Chinese official histories of the Yuán and Míng dynasties during 1261–1644 Free
Publications of the Astronomical Society of Japan, Volume 69, Issue 4, August 2017, 65, https://doi.org/10.1093/pasj/psx045
Published: 22 July 2017
Journal Article
Records of sunspot and aurora activity during 581–959 CE in Chinese official histories concerning the periods of Suí, Táng, and the Five Dynasties and Ten Kingdoms Free
Publications of the Astronomical Society of Japan, Volume 69, Issue 2, April 2017, 22, https://doi.org/10.1093/pasj/psw132
Published: 24 February 2017
