As Dispel Magic, but it only dispels the effects major wild surges. Instantaneous effects, such as a surge that dispels magic, or a surge that modifies the spell itself, cannot be dispelled. For example, you may dispel the illusory snakes that surged into being with a spell, but you may not dispel the surge that caused an Acid Fog to be maximized, nor a surge that delayed your Charm Person.
You must succeed at a caster level check to dispel the surge. You do not automatically succeed when you try to dispel surges you created yourself, but you may add a +2 circumstance bonus to the roll.
Of those listed in the major surge table, only the ones designated by an asterisk (*) may be dispelled, keeping in mind the restrictions above. (For example, you cannot dispel the health granted by contact with the Positive Material Plane, but you can dispel the temporary hit points.)
Read more about Wild Magic.