Geoefficiency of Sporadic Phenomena in Solar Cycle 24

Abstract

The specific features of solar cycle 24 are discussed, including cosmic ray variations, characteristicsof solar flares, proton events, coronal mass ejections, and the level of geomagnetic activity. It is shownthat in terms of the sunspot number and other manifestations of solar activity, cycle 24 turned out to be themost modest one over the last 100 years of observations. A significant decrease in the geoefficiency of varioussolar events is described, which manifested itself in a smaller number and magnitude of Forbusheffects recorded on the Earth, the enhancements of the fluxes of protons and electrons of different energies,and geomagnetic storms.