Studies of some aspects of solar proton events and related phenomena

The proton events were studied statistically which occurred during the period 1955 to 1985. The important results obtained are as follows: (i) the occurrence frequency distribution of proton fluxes obeys a power law, (ii) the rate of rise of proton flux varies directly with the flux values with the exponent 1.2; (iii) although the occurrences of proton events more or less follow the phase of the solar cycle, the maximum is at the 20th solar cycle peak which is less intensive than those of the 19th and 21st cycles; (iv) N-S and E-W asymmetries display definite latitude and longitude dependences, respectively. (author). 7 figs., 8 refs