cranfield0083

discuss solar proton event man space flight result studi made intern geophys year igi intern geophys cooper igc known consider fraction larg solar flare give rise almost pure stream proton reach earth continu arriv long day energi particl lie within steep spectrum extend least mev frequenc larg flare time high solar activ owe long durat solar proton emiss particl present detect intens near top earth atmospher percent time number larg flare acceler releas particl three year period event began august contribut greatli toward understand solar terrestri sequenc event addit provid first identif emit particl flare may proton neighborhood earth phenomenon recogn addit radiat hazard man vehicl high atmospher part solar system three intens event occur juli support conclus possibl predict event becam import consider addit valu protect human effect forecast clearli would great valu detail scientif studi phenomenon paper present preliminari discuss aspect predict arriv proton earth follow appear solar activ featur equal import forecast period penetr radiat unlik occur