Explaining The Universe on Instagram: "Volcanic eruptions happen when magma from beneath the Earth’s crust rises to the surface, driven by pressure from gases and molten rock deep underground. When this pressure becomes too great, it forces magma upward through cracks, creating an eruption. The erupted material can include lava, ash, volcanic gases, and rock fragments. Some eruptions are slow and steady, with lava flowing gently, while others are explosive and violent, sending ash clouds high in