Forbush effect, in geophysics, an occasional decrease in the intensity of cosmic rays as observed on Earth, attributed to magnetic effects produced by solar fla

Forbush effect, in geophysics, an occasional decrease in the intensity of cosmic rays as observed on Earth, attributed to magnetic effects produced by solar flares, which are disturbances on the Sun https://www.britannica.com/science/Forbush-effect https://www.britannica.com/science/Forbush-effect