On Cosmic Ray and Geomagnetic Response to Coronal Mass Ejections （CMEs）  

作　　者：Nagandra Kumar Sharma Devendra Singh 

机构地区：[1]Faculty of Technology, Chandra Shekher Azad University of Agriculture and Technology Campus-Etawah-206001 （U.P） India

出　　处：《Journal of Physical Science and Application》2011年第3期170-174,共5页物理科学与应用（英文版）

摘　　要：A catalogue of type II bursts and the associated coronal mass ejections （CMEs） observed by the solar and heliospheric observatory （SOHO） mission is used to select the twenty three CMEs events with CME speed equal to and less than 450 km/sec （i.e., less than and equal to the average solar wind speed） during 1997-2008. Our observational results clearly indicate that even slow speed CMEs are capable to produce the cosmic ray and geomagnetic disturbances on day to day basis. The depression in cosmic ray intensity is larger three days after the arrival of the CMEs along with the maximum disturbance in geomagnetic activity on the same day （i.e., after three days from the arrival of CMEs）. Fluctuations in cosmic ray intensity and the geomagnetic activity are also observed before the arrival of the CMEs.

关 键 词：CORONA coronal mass ejections （CMEs） galactic cosmic rays （GCR） MAGNETOSPHERE 

分 类 号：G255.2[文化科学—图书馆学]