24. Hayakawa, H., Ribeiro, P., Vaquero, J. M., Gallego, M.-C., Knipp, D. J., Mekhaldi, F., Bhaskar, A., Oliveira, D. M., Notsu, Y., Carrasco, V. M. S., Caccavari, A., Veenadhari, B., Mukherjee, S., Ebihara, Y. (2020) The Extreme Space Weather Event in 1903 October/November: An Outburst from the Quiet Sun, The Astrophysical Journal Letters. DOI ADS [Author version of 2020 January 14]
23. Hayakawa, H., Besser, B. P., Iju, T., Arlt, R., Uneme, S., Imada, S., Bourdin, P.-A., Kraml, A. (2020) Thaddäus Derfflinger's sunspot observations during 1802-1824: A primary reference to understand the Dalton Minimum, The Astrophysical Journal, 890, 98. DOI ADS
22. Hayakawa, H., Clette, F., Horaguchi, T., Iju, T., Knipp, D. J., Liu, H., Nakajima, T. (2020) Sunspot Observations by Hisako Koyama: 1945 – 1996, Monthly Notices of the Royal Astronomical Society, 492, 4513-4527. DOI ADS
21. Hayakawa, H., Mitsuma, Y., Ebihara, Y., Miyake, F. (2019) The Earliest Candidates of Auroral Observations in Assyrian Astrological Reports: Insights on Solar Activity around 660 BCE, The Astrophysical Journal Letters, 884, L18. DOI ADS
20. Hayakawa, H., Ebihara, Y., Willis, D. M., Toriumi, S., Iju, T., Hattori, K., Wild, M. N., Oliveira, D. M., Ermolli, I., Ribeiro, J. R., Correia, A. P., Ribeiro, A. I., Knipp, D. J. (2019) Temporal and Spatial Evolutions of a Large Sunspot Group and Great Auroral Storms around the Carrington Event in 1859, Space Weather, 17, 1553– 1569. DOI ADS
19. Hayakawa, H., Sôma, M., Tanikawa, K., Willis, D. M., Wild, M. N., Macdonald, L. T., Imada, S., Hattori, K., Stephenson, F. R. (2019) A Transit of Venus Possibly Misinterpreted as an Unaided-Eye Sunspot Observation in China on 1874 December 9, Solar Physics, 294, 119. DOI ADS
18. Hayakawa, H., Willis, D. M., Hattori, K., Notsu, Y., Wild, M. N., Karoff, C. (2019) Unaided-Eye Sunspot Observations in 1769 November: A Comparison of Graphical Records in the East and the West, Solar Physics, 294, 95. DOI ADS
17. Hayakawa, H., Stephenson, F. R., Uchikawa, Y., Ebihara, Y., Scott, C. J., Wild, M. N., Wilkinson, J., Willis, D. M. (2019) The Celestial Sign in the Anglo-Saxon Chronicle in the 770s: Insights on Contemporary Solar Activity. Solar Physics, 294, 42. DOI ADS
16. Hayakawa, H., Ebihara, Y., Cliver, E. W., Hattori, K., Toriumi, S., Love, J. J., Umemura, N., Namekata, K., Sakaue, T., Takahashi, T., Shibata, K. (2019) The Extreme Space Weather Event in September 1909, Monthly Notices of the Royal Astronomical Society, 484, 4083-4099. DOI ADS
15. Hayakawa, H., Ebihara, Y., Hand, D. P., Hayakawa, S., Kumar, S., Mukherjee, S., Veenadhari, B. (2018) Low-Latitude Aurorae during the Extreme Space Weather Events in 1859, The Astrophysical Journal, 869, 57. DOI ADS
14. Hayakawa, H., Vaquero, J. M., Ebihara, Y. (2018) Sporadic auroras near the geomagnetic equator: in the Philippines, on 27 October 1856, Annales Geophysicae, 36, 1153-1160. DOI ADS
13. Hayakawa, H., Ebihara, Y., Willis, D. M., Hattori, K., Giunta, A. S., Wild, M. N., Hayakawa, S., Toriumi, S., Mitsuma, Y., Macdonald, L. T., Shibata, K., Silverman, S. M. (2018) The Great Space Weather Event during 1872 February Recorded in East Asia, The Astrophysical Journal, 862, 1, 15. DOI ADS
12. Hayakawa, H., Ebihara, Y., Vaquero, J. M., Hattori, K., Carrasco, V. M. S., De la Cruz Gallego, M., Hayakawa, S., Watanabe, Y., Iwahashi, K., Tamazawa, H., Kawamura, A. D., Isobe, H. (2018) A great space weather event in February 1730, Astronomy & Astrophysics, 616, A177. DOI ADS
11. Hayakawa, H., Iwahashi, K., Fujiyama, M., Kawai, T., Toriumi, S., Hotta, H., Iijima, H., Imada, S., Tamazawa, H., Shibata, K. (2018) Sunspot drawings by Japanese official astronomers in 1749-1750, Publications of the Astronomical Society of Japan, 70, 63. DOI ADS
10. Hayakawa, H., Iwahashi, K., Tamazawa, H., Toriumi, S., Shibata, K. (2018) Iwahashi Zenbei's Sunspot Drawings in 1793 in Japan, Solar Physics, 293, 8. DOI ADS
9. Hayakawa, H., Iwahashi, K., Ebihara, Y., Tamazawa, H., Shibata, K., Knipp, D. J., Kawamura, A. D., Hattori, K., Mase, K., Nakanishi, I., Isobe, H. (2017) Long-lasting Extreme Magnetic Storm Activities in 1770 Found in Historical Documents, The Astrophysical Journal Letters, 850, 2, L31. DOI ADS
8. Hayakawa, H., Iwahashi, K., Tamazawa, H., Ebihara, Y., Kawamura, A.D., Isobe, H., Namiki, K., Shibata, K. (2017) Records of Auroral Candidates and Sunspots in Rikkokushi, Chronicles of Ancient Japan from Early 7th Century to 887, Publications of Astronomical Society of Japan, 69, 86. DOI ADS
7. Hayakawa, H., Tamazawa, H., Ebihara, Y., Miyahara, H., Kawamura, A.D., Aoyama, T., Isobe, H. (2017) Records of Sunspots and Aurora Candidates in the Chinese Official Histories of the Yuán and Míng Dynasties during 1261-1644. Publications of Astronomical Society of Japan, 69, 65. DOI ADS
6. Hayakawa, H., Mitsuma, Y., Fujiwara, Y., Kawamura, A. D., Kataoka, R., Ebihara, Y., Kosaka, S., Iwahashi, K., Tamazawa, H., Isobe, H. (2017) The earliest drawings of datable auroras and a two-tail comet from the Syriac Chronicle of Zūqnīn. Publications of Astronomical Society of Japan, 69, 17. DOI ADS
5. Hayakawa, H.., Tamazawa, H., Uchiyama, Y., Ebihara, Y., Miyahara, H., Kosaka, S., Iwahashi, K., Isobe, H. (2017) Historical aurora evidences for great magnetic storms in 990s. Solar Physics, 292, 1-14. DOI ADS
4. Hayakawa, H., Mitsuma, Y., Ebihara, Y., Kawamura, A.D., Miyahara, H., Tamazawa, H., Isobe, H. (2016) Earliest datable records of aurora-like phenomena in the astronomical diaries from Babylonia. Earth, Planets, and Space, 68, 195. DOI ADS
3. Hayakawa, H., Iwahashi, K., Tamazawa, H., Isobe, H., Kataoka, R., Ebihara, Y., Miyahara, H., Kawamura, A.D., Shibata, K. (2016) East Asian observations of low latitude aurora during the Carrington magnetic storm. Publications of Astronomical Society of Japan. 68, 99. DOI ADS
2. Hayakawa, H., Isobe, H., Kawamura, A.D., Tamazawa, H., Miyahara, H., Kataoka, R. (2016) Unusual rainbow and white rainbow: a new auroral candidate in oriental historical sources. Publications of Astronomical Society of Japan, 68, 33. DOI ADS
1. Hayakawa, H., Tamazawa, H., Kawamura, A. D., Isobe, H. (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 ADS
17. Uchikawa, Y., Cowley, L., Hayakawa, H., Willis, D. M., Stephenson, F. R. (2020) Provenance of the Cross Sign of 806 in the Anglo-Saxon Chronicle: A possible Lunar Halo over Continental Europe? History of Geo- and Space Science. DOI ADS [Author version of 2020 March 7]
16. Isobe, H., Ebihara, Y., Kawamura, A. D., Tamazawa, H., Hayakawa, H. (2019) Intense geomagnetic storm during Maunder minimum possibly by a quiescent filament eruption, The Astrophysical Journal, 887, 1, 7. DOI ADS
15. Love, J. J., Hayakawa, H., Cliver, E. W. (2019) Intensity and impact of the New York Railroad superstorm of May 1921, Space Weather, 17, 1281–1292. DOI ADS
14. Hattori, K., Hayakawa, H., Ebihara, Y. (2019) Occurrence of great magnetic storms on 6-8 March 1582, Monthly Notices of the Royal Astronomical Society, 487, 3550–3559. DOI ADS
13. Fujiyama, M., Hayakawa, H., Iju, T., Kawai, T., Toriumi, S., Otsuji, K., Kondo, K., Watanabe, Y., Nozawa, S., Imada, S. (2019) Revisiting Kunitomo's Sunspot Drawings during 1835-1836 in Japan, Solar Physics, 294, 43. DOI ADS
12. Carrasco, V. M. S., Vaquero, J. M., Gallego, M. C., Álvarez, J. V., Hayakawa, H. (2019) Two debatable cases for the reconstruction of the solar activity around the Maunder Minimum: Malapert and Derham. Monthly Notices of the Royal Astronomical Society, 485, L53-L57. DOI ADS
11. Mitsuma, Y., Hayakawa, H. (2019) An Unusual Arc and the Eclipsed Moon with Colour of elmēšu. Nouvelles Assyriologiques Brèves et Utilitaires, 2019/1, 48-50.
10. Stephenson, F. R., Willis, D. M., Hayakawa, H., Ebihara, Y., Scott, C. J., Wilkinson, J., Wild, M. N. (2019) Do the Chinese Astronomical Records Dated A.D. 776 January 12/13 Describe an Auroral Display or a Lunar Halo? A Critical Re-examination, Solar Physics, 294, 36. DOI ADS
9. Namekata, K., Maehara, H., Notsu, Y., Toriumi, S., Hayakawa, H., Ikuta, K., Notsu, S., Honda, S., Nogami, D., Shibata, K. (2019) Lifetimes and Emergence/Decay Rates of Star Spots on Solar-type Stars Estimated by Kepler Data in Comparison with Those of Sunspots. The Astrophysical Journal, 871, 187. DOI ADS
8. Love, J. J., Hayakawa, H., Cliver, E. W. (2019). On the intensity of the magnetic superstorm of September 1909. Space Weather, 17, 37–45. DOI ADS
7. Willis, D. M., Wilkinson, J., Scott, C. J., Wild, M. N., Stephenson, F. R., Hayakawa, H., Brugge, R., Macdonald, L. T. (2018). Sunspot observations on 10 and 11 February 1917: A case study in collating known and previously undocumented records. Space Weather, 16, 1740-1752. DOI ADS
6. Ebihara, Y., Hayakawa, H., Iwahashi, K., Tamazawa, H., Kawamura, A.D., Isobe, H. (2017) Possible cause of extremely bright aurora witnessed in East Asia in September 1770, Space Weather, 15, 1373-1382. DOI ADS
5. Knipp, D.J., Liu, H.-X., Hayakawa, H. (2017) Ms. Hisako Koyama: From Amateur Astronomer to Long-term Solar Observer, Space Weather, 15, 1215–1221. DOI ADS
4. Tamazawa, H., Hayakawa, H., Iwahashi, K. (2017) Astronomy and Intellectual Networks in the late 18th Century in Japan: A Case Study of Fushimi in Yamashiro. Historia Scientiarum, 26, 172-191. Research Gate
3. Kataoka, R., Isobe, H., Hayakawa, H., Tamazawa, H., Kawamura, A. D., Miyahara, H., Iwahashi, K., Yamamoto, K., Takei, M., Terashima, T., Suzuki, H., Fujiwara, Y., Nakamura, T. (2017) Historical space weather monitoring of prolonged aurora activities in Japan and in China. Space Weather, 15, 392-402.
2. Tamazawa, H., Kawamura, A. D., Hayakawa, H., Tsukamoto, A., Isobe, H., Ebihara, Y. (2017) 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. Publications of Astronomical Society of Japan, 69, 22.
1. Kawamura, A.D., Hayakawa, H., Tamazawa, H., Miyahara, H., Isobe, H. (2016) Aurora candidates from the chronicle of Qīng dynasty in several degrees of relevance. Publications of Astronomical Society of Japan, 68, 79. DOI ADS
早川尚志, 海老原祐輔（2020）「歴史に刻まれた巨大宇宙天気現象」『太陽地球圏環境予測』 URL [Author version of 2020 March 10]
玉澤春史, 早川尚志, 河村聡人, 磯部洋明（2017）「歴史書に眠る太陽活動1000年の再検討」『天文月報』 110, 464-471. URL
三津間康幸, 早川尚志（2017）「世界最古のオーロラ文字記録と図像記録」『天文月報』110, 472-479. URL
早川尚志, 岩橋清美（2017）「東アジアの歴史書に記録されたキャリントン・イベント」『天文月報』 110, 455-463. URL
Last Update on 2020 March 10