Blast Wave and Knockback Range

[Aleksej89]

Could anyone please tell me what is the knock back distance of Blast Wave? Im unable to test this since i dont have BW yet.
Shaman's Thunderstorm is 20yards but i do not know how far does Blast Wave knock enemies back?

Thanks for reading and answering.
Cheers all..

[Swizzle]

not very far, 10 yards at the most, the thing that blastwave has that thunderstorm doesn't is a DoT on crit and a daze.