Effusive eruptions are generally considered to be gentler than explosive eruptions. During an effusive eruption, large volumes of lava pour from a vent onto the ground. These lava flows can vary in volume, area covered, thickness, length, and composition. Though effusive eruptions are generally associated with lava pouring out of a vent, some eruptions can include fantastic displays of fire and fury. Lava fountains can reach hundreds of meters into the air. Here are some of the hazards that can result from effusive eruptions: