GEOLOGY

Detailed explanation-1: -Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires.

Detailed explanation-2: -A debris avalanche may be caused by collapse of the crater wall or unstable volcanic slope. The resulting avalanche may bury large tracts of land and dam streams forming lakes. These reservoirs can cause devastation when they burst by generating lahars and floods.

Detailed explanation-3: -Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.

Detailed explanation-4: -A magma’s composition, viscosity, and gas content, the eruption rate, and the size of the magma reservoir determines many aspects of eruptions, including how explosive they are.