抄録
It has been observed that the low energy cosmic rays are produced associated with solar flares and propagate into interplanetary space. In this paper, we examined the features of the propagation mechanism of these cosmic rays, taking into account the results deduced from the theory of geomagnetic effect on these low energy cosmic rays. In consequence, we can conclude that the features of their incidence to the earth must have the impact zone effects, G. M. T. effects, and seasonal variations. Then, we examined the relations between these low energy cosmic ray events and solar and terrestrial phenomena in view of the observed data and made clear that both of flares and type IV outbursts taking place on western side of the sun seem to correlate these cosmic ray events much better. Taking into account those results we tried to explain reasonably the propagation mechanism of these low energy cosmic rays into interplanetary space and in addition to estimate the properties of magnetic clouds in that space.
