GEOLOGY

Detailed explanation-1: -Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground. Subtle swelling of the ground surface. Small changes in heat flow. Changes in the composition or relative abundances of fumarolic gases.

Detailed explanation-2: -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-3: -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-4: -Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth’s surface.

Detailed explanation-5: -Preparing to evacuate Tune in the radio or television for volcano updates. Listen for disaster sirens and warning signals. Review your emergency plan and gather your emergency supplies. Be sure to pack at least a 1-week supply of prescription medications.