Tectonic plates sliding past each other :)
Human activities directly contribute to landslides especially the kaingin system practiced by some farmers and the ruthless illegal logging for some loggers. These selfish practices harmed the nature causing soil erosion and worse landslides due to the absence of trees.
They are all top producers of diamonds
Because of its location between the outer Midwest and great planes, it stays very hot but not humid in the summer and much colder than usual in the winter
Hunting fighting and building huts