Exceptionaly Low Amplitude Anisotropic Wave Train Events in Cosmic Ray Intensity

Authors : Rajesh K MISHRA, Rekha Agarwal MISHRA

Pages : 175-187

Doi:10.3906/sag-1205-54

View : 15 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The unusually low amplitude anisotropic wave train events insert ignore into journalissuearticles values(LAEs); in cosmic ray intensity using the ground-based Deep River neutron monitor data has been studied during the period 1991--94. It has been observed that the phase of the diurnal anisotropy for majority of the LAE events remains in the corotational direction. However, for some of the LAE events the phase of the diurnal anisotropy shifts towards earlier hours. On the other hand, the amplitude of the semi-diurnal anisotropy remains statistically the same whereas, phase shift towards later hours; similar trend has also been found in case of tri-diurnal anisotropy. The interplanetary magnetic field insert ignore into journalissuearticles values(IMF); and solar wind plasma insert ignore into journalissuearticles values(SWP); parameters during these LAEs are also investigated.
Keywords : Cosmic ray, diurnal, semi diurnal and anisotropy