Volcanic Domes - Cinder Cones Prof. Basaltic lava flows are not generally life threatening. Structural damage to roofs. Pyroclastic Flows - avalanche of hot volcanic debris and gas. Lateral Blast- explosions of gas and ash from the sides.
Ejected materials can travel at the speed of sound.
Occurs when magma reacts with water. SO2 and H2S can dissolve in water vapor to produce acid rain. Melting ice or heavy rain generally are the source of H2O. River valleys on the slopes are vulnerable. Lahars entering lakes or reservoirs can cause large waves. Some Examples of Devastating Volcanic Events 1.