Volcanic eruptions refer to the sudden and violent release of molten rock, steam, ash, and other volcanic materials from a volcano. This can occur when pressure builds up inside the volcano due to the movement of tectonic plates or for other reasons such as magma buildup. When this happens, the volcano may erupt explosively or effusively, depending on the type and amount of material being released. Volcanic eruptions can have significant impacts on the environment, human life, and ecosystems, including causing loss of life, destruction of property, and disruption to air travel and other activities.