A volcano " vents " gas when pressure builds up
It is called Eruption.
E r u p t i o n or maybe phreatic
bubbles
Such a hole is called a fumarole.
A vent through which gas, ash, and magma erupt onto Earth's surface is called a volcano.
A mountain with a crater is called a volcanic mountain or a volcano. It is created when molten rock, ash, and gas are expelled from the Earth's mantle through a vent or opening in the Earth's surface.
The top pit of a volcano is called the crater. It is the opening at the summit of the volcano where volcanic activity such as eruptions and gas emissions occur.
When a volcano throws lava into the air, it is called a lava fountain or a lava fountain eruption. This happens when gas bubbles within the lava force it out of the volcano's vent, causing it to shoot upward in a fiery display.
A prominence is when a solar flare ejects matter from the suns surface as a stream of incandescent gas.
Gas is stored in the Magma chamber at the bottom of the volcano, along with the magma.
This is the description of a volcanic eruption.A eruption.
A live volcano is simply called an active volcano.