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Variation of Cosmic Ray Intensity during Different Types of Solar Eclipses from 1990 to 2017 (August)

Abdullah Al Zaman MD and Jahan Monira N

In this study, we have calculated the variations of cosmic ray intensity during the solar eclipses (including Annular, Total, Partial and Hybrid) from 1990 to 2017 (August) by using the online cosmic ray data from Mexico City Cosmic Ray Observatory. We haven’t found significant changes in the cosmic ray intensity during the solar eclipses in most of the cases. The increment and decrement tendencies of intensity have been observed but in 95% occasions variation didn’t go beyond 2% relative to the days close to the eclipse. The highest amount of variation found is 4.25% (decreased) during an annular eclipses in 2003. If we had analyzed the composition of the cosmic rays with their energies, we could have got a clearer picture.