@article{oai:jaxa.repo.nii.ac.jp:00033069,
 author = {藤井, 良一 and 福西, 浩 and 国分, 征 and 杉浦, 正久 and 遠山, 文雄 and FUJII, R. and FUKUNISHI, H. and KOKUBUN, S. and SUGIURA, M. and TOHYAMA, F.},
 journal = {宇宙科学研究所報告. 特集: 宇宙観測研究報告},
 month = {Jan},
 note = {1989年3月13日の大磁気嵐中に, EXOS-Dに搭載されたフラックスゲート磁力計により観測された沿磁力線電流(FAC)の特性について報告する。本磁気嵐は地磁気観測史上有数の磁気嵐であり, その間にEXOS-Dは午前昼間側及び夕方側で大規模なFACを観測した。午前側のFACの特性は, 1)地磁気嵐主相では, 地磁気緯度で50°から80°にも及ぶ広いFAC領域が観測された。2)FACの極性は, 低緯度から上向き, 下向きのFACの他にそれらの高緯度側に上向きの大規模FACが出現した。3)この高緯度側の上向きFAC高緯度境界に狭い緯度巾(1.5°)のペアーのFACが観測された。夕方側のFACの特性は, 1) FACの低緯度側境界はSSCの直後から低緯度側に移動しはじめるが, 高緯度側境界は即座には反応しない。2)磁気嵐の回復期には逆に高緯度境界は直ぐに反応し高緯度側に移動しはじめたが, 低緯度側境界は遅れて反応した。, The EXOS-D satellite was launched on February 22,1989 into an elliptic orbit with a 75°inclination and with an initial perigee and apogee of about 275km and 10500km, respectively. Although the complete set of observations did not begin until the beginning of April, the fluxgate magnetometer was in operation during the great magnetic storm of March 13,1989,which has been one of the greatest storms this century. This preliminary report describes the characteristics of the field-aligned currents (FACs) observed by EXOS-D in the morning and evening sectors during this magnetic storm. The FAC system in the morning sector observed during the main phase spread greatly in invariant latitude (33°), its lowest latitude reaching as low as 50°. FAC events both in the main and recovery phases showed the following common features : (i) The presence of a pair of distinct FAC regions, an upward current on the poleward part and a downward current equatorward; (ii) the existence of a pair of FACs with narrow latitudinal width (1.5°) at the poleward edge of upward current in (i). In the evening sector the lower latitude boundary of the FACs began to move equatorward right after the SSC and eventually reached as low as 50°, but the higher latitude one did not immediately respond to the SSC. As the recovery the storm progressed, on the other hand, the higher latitude boundary of the FACs returned poleward more quickly than the lower latitude boundary., 資料番号: SA0166928000},
 pages = {113--119},
 title = {EXOS-D 搭載磁力計で観測された 3 月 13 日大磁気嵐中の沿磁力線電流分布},
 volume = {25},
 year = {1990}
}