▁thought ▁that ▁the ▁energy ▁necessary ▁to ▁heat ▁the ▁cor ona ▁is ▁provided ▁by ▁tur bul ent ▁motion ▁in ▁the ▁con ve ction ▁zone ▁below ▁the ▁photos phere , ▁and ▁two ▁main ▁mechan isms ▁have ▁been ▁proposed ▁to ▁explain ▁cor onal ▁he ating . ▁The ▁first ▁is ▁wave ▁he ating , ▁in ▁which ▁sound , ▁gravit ational ▁or ▁magnet oh yd rod ynamic ▁waves ▁are ▁produced ▁by ▁tur bul ence ▁in ▁the ▁con ve ction ▁zone . ▁These ▁waves ▁travel ▁up ward ▁and ▁diss ip ate ▁in ▁the ▁cor ona , ▁depos iting ▁their ▁energy ▁in ▁the ▁ambient ▁gas ▁in ▁the ▁form ▁of ▁heat . ▁The ▁other ▁is ▁magnetic ▁he ating , ▁in ▁which ▁magnetic ▁energy ▁is ▁continu ously ▁built ▁up ▁by ▁photos pher ic ▁motion ▁and ▁released ▁through ▁magnetic ▁recon nection ▁in ▁the ▁form ▁of ▁large ▁solar ▁fl ares ▁and ▁my ri ad ▁similar ▁but ▁smaller ▁events — nan of lar es . ▁ ▁Currently , ▁it ▁is ▁unclear ▁whether ▁waves ▁are ▁an ▁efficient ▁he ating ▁mechanism . ▁All ▁waves ▁except ▁Alf v én ▁waves ▁have ▁been ▁found ▁to ▁diss ip ate ▁or ▁ref ract ▁before ▁reaching ▁the ▁cor ona . ▁In ▁addition , ▁Alf v én ▁waves ▁do ▁not ▁easily ▁diss ip ate ▁in ▁the ▁cor ona . ▁Current ▁research ▁focus ▁has ▁therefore ▁shift ed ▁towards ▁f lare ▁he ating ▁mechan isms . ▁ ▁Cor onal ▁mass ▁e jection ▁A ▁cor onal ▁mass ▁e jection ▁( C ME ) ▁is ▁an ▁e ject ed ▁pl asma ▁consisting ▁primarily ▁of ▁electrons ▁and ▁pro