Unusually low-amplitude anisotropic wave-train events of cosmic ray intensity during 1981-1994

Pramana

Rajesh K Mishra1¹  Rekha Agarwal Mishra² 

[1] Computer and I.T. Section, Tropical Forest Research Institute, Jabalpur 482 001, India$$;Department of Physics, Government Model Science College (Autonomous), Jabalpur 482 001, India$$

关键词: Cosmic ray;    diurnal;    semi-diurnal;    anisotropy;    interplanetary magnetic field.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Investigation has been made for unusually low-amplitude anisotropic wave train events (LAE) for cosmic ray intensity data of Deep River neutron monitoring station during the period 1981-94. It has been observed that the phase of diurnal anisotropy remains in the same co-rotational direction for most of the LAEs while the phase shifts to early hours for some of the LAEs in diurnal anisotropy. During minimum solar activity, LAEs have been observed to be dominant. Solar wind plasma (SWP) parameters, interplanetary magnetic field and various features at solar disk have also been studied. The amplitude remains low continuously for most of the days while the phase shifts to earlier hours. Occurrence of LAE is independent of the nature of interplanetary magnetic field (IMF).

【 授权许可】

Unknown