@article{oai:nagoya.repo.nii.ac.jp:00018489, author = {Hiei, E. and Yamaguchi, K.}, issue = {2}, journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University}, month = {Nov}, note = {Optical phenomena of solar activity in February 1986 are summarized. There appeared three active regions, NOAA AR4711, 4712, and 4713, and AR4711 and 4713 produced large flares., This special issue contains contributed papers presented at the symposium "Solar Terrestrial Events in February-March 1986" (January 19, 1989, Nagoya)}, pages = {17--26}, title = {ACTIVE PHENOMENA OF THE SUN IN FEBRUARY 1986}, volume = {36}, year = {1989} }