The movement of the Earth's crust suddenly along the edge of the plate tectonics or move along the volcanic explosion of the underground cavity collapse landslides bat Ka UM a large fall, etc.
The sudden shift of the earth's crust. Along the edges of the plates Or along fault Volcanic eruption The collapse of underground cavities landslides meteor fall so large.
The motion of the earth suddenly. Along the edges of the plates or along the fault zone, the explosion of a volcano, the collapse of the hollow beneath the soil, landslide, a large meteor fall.