@article{oai:nagoya.repo.nii.ac.jp:00018506, author = {Oki, T. and Matsuura, O. and Saito, T.}, issue = {2}, journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University}, month = {Nov}, note = {The plasma tail of comet Halley showed outstanding disturbances in March, 1986. The disturbances were well observed from the ground, owing to the good geometrical condition. The comet Halley spacecraft "SAKIGAKE" provided us with direct observational data on the solar wind during 10-11 of this month, regarding a possible effect on the tail disturbances during the later days. Hence, a remarkable disturbance of the plasma tail of comet Halley observed during 12-14, March is analyzed in the present paper based on eight photographs taken from the ground. The distance X from the nucleus to the kinked type disturbance and the velocity V of the kink are measured for time t, and are expressed by X-t and V-t curves, respectively. The curves coincide quite well with those of the January 10-11 kink event and are not coincident with those of the December 31 DE event of comet Halley. Hence, our March 12-14 disturbance is concluded not to be a DE by the dayside crossing process, but to be a kink generated in the ordinary flow by the similar process with the January 10-11 kink event., This special issue contains contributed papers presented at the symposium "Solar Terrestrial Events in February-March 1986" (January 19, 1989, Nagoya)}, pages = {173--180}, title = {THE DISTURBANCE OF THE PLASMA TAIL OF HALLEY'S COMET ON MARCH 12-14, 1986}, volume = {36}, year = {1989} }