The Moon
solar minimum, but only 14 percent during years of solar
maximum. It has been suggested that cosmic radiation
may be a factor, since this form of radiation penetrates
more deeply into the solar system during years of low
solar activity, while during years of high solar activity a
more powerful solar wind helps to keep out cosmic
radiation.
Thunderstorms and Cosmic Radiation
It has been shown that the maximum activity of
thunderstorms coincides with the maximum in galactic
cosmic radiation and vice versa, that minimum
thunderstorm activity coincides with the minimum in
galactic cosmic ray radiation. There have been many
studies on the relationship of cosmic radiation to lunar
activity. Cosmic radiation consists of energetic particles
entering our solar system from beyond its aura, the
magnetosphere. As mentioned, there is an inverse
relationship between cosmic radiation and solar activity.