User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5460283-20120906021128/@comment-5460283-20120913125808

Or it could be that Raviente specificly search for a volcano that is about to erupt to make a nursery by first eating until it had its fill and then creating a disturbance that would make the volcanoe erupt.

That or the Raviente accidentaly made it erupt.