@inproceedings{oai:jaxa.repo.nii.ac.jp:00003362,
 author = {石井, 守 and Ishii, Mamoru},
 book = {宇宙航空研究開発機構特別資料: 第13回「宇宙環境シンポジウム」講演論文集, JAXA Special Publication: Proceedings of the 13th Spacecraft Environment Symposium},
 month = {Feb},
 note = {第13回宇宙環境シンポジウム (2016年11月1日-2日. 情報通信研究機構 本部 国際会議室), 小金井市, 東京, The 13th Spacecraft Environment Symposium (November 1-2, 2016. National Institute of Information and Communications Technology), Koganei, Tokyo, Japan, The solar activity has been in decreasing phase since 2013 and the number of space weather phenomena, e.g., solar flare becomes small. On the other hand, the discussion of social necessity of space weather is increasing now., 資料番号: AA1630038001, レポート番号: JAXA-SP-16-010},
 pages = {1--2},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {宇宙天気をめぐる最近の動向},
 volume = {JAXA-SP-16-010},
 year = {2017}
}