Calc Indivisible - Kala's awakening

(http://imgur.com/0CF5nan)

Kala's awakening is felt all over the world (and tanked at ground zero by Heruka Ajna). As everyone felt it, and we see the ground visibly shake, that would be a VI, or strong.
To shake the planet, we'll need the circumference of the planet, which is 20,037.5km, or 12450.725264 miles. Now we have all that, we mess around the the impact calculator until we have our value of 108 megatons.

Final Results
Kala's awakening = 108 megatons

Remember, this just from Kala waking up, not nearly her full strength. Heruka Ajna tanks it at ground zero, though is sent flying hundreds of miles away.