Streaming of Solar Cosmic Rays

A comprehensive study of the anisotropy (i.e. streaming) of solar cosmic rays at energies 10 MeV revealed two distinct types (McCracken). The first occurs during onset phase of the event, is large (> 20%), and is really the flow of cosmic rays along lines of force driven by a density gradient. The second describes the decay of the event, is small (10%), and indicates a flow radially away from the Sun.