EDIT: Updated to reflect Contemplar's correction re: SKILL instead of Ranks.
When casting either bolt, there is a seed 5 Elemental Lore, Air SKILL chance of applying a persistent electrical jolt on the target called Stun Shock. It will last for 8 + seed 10 ranks of Elemental Lore, Water seconds. Every 4 seconds, Stun Shock will either stun or cause minor electrical damage to the target.
Additionally, water mages discovered untapped reservoirs when casting Minor Water and now have the ability to soak their targets. There is a 20 + Elemental Lore, Water skill / 2 chance to soak the target for 20 seconds. A soaked target is more susceptible to Minor and Major Shock spells and will grant a flat +30% chance and +3 second duration to Stun Shock.
~Contemplar~
I apologize for the slight error there. It is seed 5 Elemental Lore, Air SKILL chance of applying a persistent electrical jolt...
~Contemplar~