Eruptions are natural events where molten rock, gases, and ash are expelled from a volcano. This process occurs when pressure builds up inside the Earth, causing magma to rise to the surface. When the pressure becomes too great, it results in an explosive release, which can vary in intensity and duration. There are different types of eruptions, including effusive eruptions, where lava flows steadily, and explosive eruptions, which can send ash and debris high into the atmosphere. The impact of eruptions can be significant, affecting local ecosystems, climate, and human settlements near volcanoes.