How can i decrease my attack speed for Earthquake?

One more question pls. Earthquake does 109% base damage but the aftershock says it does 79% more Damage.

1. Is that more base damage? as in a total of 188% base damage?
2. Or is it a general more damage like a support gem? In which case it sucks because the base damage would still be only 109%.

It's the same as, say, Molten strike. Base damage is 146% and projectiles do 40% less, so base damage of melee hit is 146% and projectile base is 87%.

For earthquake it would be 109% for initial hit and 195% for the aftershock, yeah, a sick skill.

Holly shit! ..Then 188% base attack damage is perfect for my bleed build :D

I was using Spectral blades so far but now i will definitely respec into Earthquake :D