Are flying units damaged by earthquake ?

[CharonJr]

Hello,

I have been wondering if flying units are damanged by the battlefield-wide earthquake spell (forgot its name), or are they considered to be flying all the time and thus are not damaged by it ?

I am thinking about sending in 5 earthmages with boots of flying into heavily defended enemy provinces and have them cast earthquakes, but since they are rather fragile I would hate to kill my own mages and their supporting flyers

Thx,

CharonJr