A volcanic eruption occurs when magma from deep within the earth pushes through the mantle and crust, releasing lava, steam, and gases into the atmosphere. An erupting volcano can produce lava flows, poisonous gases, ashfalls, pyroclastic flows, lahars, and volcanic debris avalanches. Volcano monitoring is essential to assess hazards and provide early warnings, helping mitigate volcanic risks. Proper preparation includes having emergency plans, safety equipment, and following evacuation orders from authorities during an eruption.