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Modulation in Cosmic ray During the Declining and Minimum Solar Activity Period of Solar Cycle 23

Author Affiliations

  • 1 Department of Physics, Jawahar Lal Nehru college of Technology, Rewa MP, INDIA
  • 2 Department of Physics, Rewa Engineering College, Rewa MP, INDIA
  • 3 Department of Physics, Model Science College, Rewa MP, INDIA
  • 4 Department of Physics, A.P.S. University, Rewa, MP, INDIA

Res. J. Physical Sci., Volume 2, Issue (2), Pages 9-12, May,4 (2014)


We study modulation in galactic cosmic rays (GCRs) during the declining and minimum solar activity period, of solar cycle 23. We study the simultaneously relation between variation in cosmic ray intensity recorded by neutron monitors (Moscow and Oulu) and solar interplanetary parameters from omniweb data centre during this period. We observe a record high GCR intensity with low values of solar activity indices such as interplanetary magnetic field (IMF), sunspot number (SSN), solar wind velocity 10.7cm solar radio flux and also find co-relation between GCR intensity and SSN, is weak and better with solar wind velocity and interplanetary magnetic field.


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