Solar proton events in relation to H-alpha flares

Abstract

A study has been made about the solar proton events observed by NOAA satellite during the period 1976-1993 by considering their association with Hα-flares. The proton flux has been found to depend linearly upon the estimated flare energy output per day. The proton flux varies with the rise time also in a linear way. Study about the visual features of the proton - associated Hα-flares reveals that the proton events are connected with those kinds of flares which have multiple instabilities in the associated active regions