They all have a chance to activate on attack.
You can find a list of affixes with minimal description here: Skaul's Hierarchy of Tips and Tricks [SHTT] [2.5]
These are the damages they do:
Cyclone - 300% MH
Bombard - 250% MH
CosmicOrb - 300% MH
RockBlast - 200% MH
Earthquake - 300% MH
Arc - 350% MH
Apocalypse - 300% MH
Vanish - 100% OH
Nova - 250% OH
Enigma - 250% OH