The vocalno eruptions born pressure and density of under surface is called magma. When the pressure and density increase always It will make a volcano eruption. There may be moderate to most severe. The mountain has a conical shape. However, the volcano is a conical shape, but on balance is broken, deep and filled with water. The size, form, the pressure and density will erupt can be very different. Depending on the size and shape of the volcano. How big is the pressure and density and much. The impact of the volcano will cause a lot of damage to the environment and smoke around the volcano. A volcano near the community cause disastrous great times. As the earthquake make the building collapse. Stream of lava, volcanic ash gravel and flowing down and the destroy of the village by around, but the eruption of volcano effects is magma which minerals and gems up with lava.