The Solar Maximum Mission akawana zviuru mifananidzo rezuva korona asati re-kupinda mumhepo yepasi muna June 1989. yakatanga muna 1991, Japan raMwari (Sun) Satellite akacherechedza rezuva flares pa X-ray wavelengths. zvisinei ichi muchadenga rakagadzirirwa kucherechedza zvakasiyana siyana rezuva flares uye UV nemwaranzi kubva rezuva flares munguva yakakwirira rezuva basa uye rezuva luminosity.
kuora kwezuva kwakafanana nerin'i muna 2001