Explosive eruptions are powerful volcanic events characterized by the violent release of gas, ash, and magma. These eruptions occur when pressure builds up in a volcano due to the accumulation of gases and molten rock. When the pressure exceeds the strength of the surrounding rock, it results in a sudden and forceful explosion, sending materials high into the atmosphere. During explosive eruptions, volcanic ash can spread over large areas, affecting air quality and climate. Famous examples of explosive eruptions include the eruption of Mount St. Helens in 1980 and the Krakatoa eruption in 1883, both of which had significant impacts on their surroundings and beyond.