User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5043481-20121021210526/@comment-4212769-20121023175110

Though when it moves underground or wants to emerge the quakes would just make monsters flee as it is their instinct.

What if Gravios would have fleed? It doesn't change that Akantor provoked it, does it? Also Gravios cannot fly very good and normally doesn't fly away.

They aren't fixed to the area, yes, though they live in there much time or they wouldn't be found there regularly.