Calc Jason vs Enceladus (PJO)

The Lost Hero said:
[Enceladus] swept his spear sideways, met Jason's javelin--and with a snap like a shotgun blast, the golden weapon shattered.

The explosion was hotter than the giant's breath, blinding Jason with golden light. The force knocked him off his feet and squeezed the breath out of him.

When he regained his focus, he was sitting at the rim of a crater. Enceladus stood at the other side, staggering and confused. The javelin's destruction had released so much energy, it had blasted a perfect cone-shaped pit thirty feet deep, fusing the dirt and rock into a slick glassy substance.

Click to expand...

During Jason's fight with Enceladus, Ivlivs breaks and releases enough energy to blast that shit into the top of Mt. Diablo. The crater is 30 feet deep, but what about the diameter? Well, Leo implants a giant ax in Enceladus's breastplate and Enceladus falls headfirst from the edge of the pit and slides down the side. Therefore, the radius has to be at least as long as Enceladus is tall.

The Lost Hero said:
The giant Enceladus was so large, so horrible, Leo didn't want to look at him.

But he forced himself to focus on the monster.

To start with, he was thirty feet tall--easily as tall as the treetops.

Click to expand...

vcone=pi*r^2*h
v=pi*9.144^2*9.144
v=2401.92m^3

Sounds a lot like vaporization to me, considering the walls of the crater were fused and there was smoke everywhere. Gonna use the value for granite, which IIRC is 25700J/cc.

2401.92*1000000*25700=61729344000000J

or about 14.8 kilotons.

Both Jason and Enceladus took this point blank. Also of note, Enceladus says he's easily the least of his brethren.