Study on anomalous behavior of cosmic ray intensity during rising phase of solar cycle 24

The solar parameter and cosmic ray intensity for the rising phase of solar cycle 24 have been analyzed. In this analysis we have used the data collected from Moscow (2.42 GV) neutron monitor station and Oulu (2.32 GV) neutron monitor stations for the 1996 to 2012. The cosmic ray intensity increases in the solar cycle 24. The cosmic ray intensity and sunspot number shows negative correlation with each other. As for as normal behavior of cosmic ray intensity is concerned when the cosmic ray intensity is at maximum the sunspot number is at minimum and when the cosmic ray intensity shows minimum the sunspot number shows maximum. However, during solar cycle 24, there are quiet some periods during which both cosmic ray intensity and sunspot number increases or decreases simultaneously. This is not the normal behavior of the cosmic ray intensity but is anomalous behavior of cosmic ray intensity. From this study, it is observed that during the period April, 2003 both the SSN and cosmic ray intensity decreased which shows anomalous behavior of cosmic ray intensity. It is observed that during the period February, 2004 both the SSN and cosmic ray intensity increased which shows anomalous behavior of cosmic ray intensity. It is observed that during the period August, 2005 both the SSN and cosmic ray intensity decreased which shows anomalous behavior of cosmic ray intensity. As we approach towards the solar cycle 24. From the study it is observed that during the period March, 2010, both the SSN and cosmic ray intensity decreased this shows anomalous behavior of cosmic ray intensity. Again it is observed that during the period November, 2011, both the cosmic ray intensity and SSN increased which is again an anomalous behavior of cosmic ray intensity. It is observed that during the period February, 2012, both the cosmic ray intensity and SSN decreased which is again an anomalous behavior of cosmic ray intensity.