A volcanic eruption occurs when there is a sudden release of magma, gas, and ash from a volcano. This process can happen when pressure builds up inside the Earth, causing the magma to rise through cracks in the crust. Eruptions can vary in intensity, from gentle lava flows to explosive blasts that send ash high into the atmosphere. During an eruption, materials such as lava, tephra, and volcanic ash are expelled. These materials can impact the surrounding environment, affecting air quality and local ecosystems. Eruptions can also pose risks to nearby communities, leading to evacuations and long-term changes in the landscape.