Question

What happens before the volcano erupts?

Answer 1

Answer:

Before an Eruption

Before a volcano erupts, there is normally an increase in earthquakes and tremors near and under the volcano. These are caused by magma (molten rock) pushing upward through the rock under the volcano. The ground may crack open and allow steam to escape.

Answer 2

Answer:

earthquake  

the plates below the volcano moves and this cause earthquake and then volcano eruption