Third harmonics of cosmic ray intensity on quiet days at Deep River Neutron Monitoring Station

Pramana

M K Richharia1¹ 

[1] Department of Physics, Government Science College (Autonomous), Jabalpur 482 001, India$$

关键词: Cosmic rays;    higher harmonics;    geomagnetically quiet days.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The cosmic ray (CR) intensity data recorded in Deep River Neutron Monitoring Station have been investigated on quietest days (QD) for third harmonics of daily variation during solar cycles 21 and 22. It has been observed that in spite of abrupt change in the amplitude and phase of tri-diurnal anisotropy in CR intensity, the amplitude is quite significant throughout the period of investigation with larger amplitude during the years 1980 and 1985. Thus, tri-diurnal anisotropy clearly shows 11-year variation at the mid latitude neutron monitoring station.

【 授权许可】

Unknown