Volcanic eruptions occur when the ash, molten rocks and steam pass through the vents within the Earth’s crust. Volcanic eruptions occur because of the magma which is a mixture of dissolved gases, liquid rocks, and crystals. This mixture of gases expels over the earth's surface which includes Sulphur dioxide, carbon dioxide, hydrochloric acid, hydrogen sulfide, hydrogen gas, methane, carbon monoxide, and others. There are 3 different magma which include mafic, intermediate and felsic. All magmas contain gases that have an explosive character. The most common gases involved in the volcanic eruption include H20, C02 and minor amounts of CL, F, and Sulfur. The temperature range of volcanic eruptions ranges 800-12000C. The viscosity of volcanic eruptions depends on their types. The primary products of volcanic eruption include lava flow, ash falls, poisonous gas emissions and pyroclastic material. Other tertiary products of volcanic eruption include mudflow, flooding, debris flow, and landslides, tsunami, atmospheric effects along with earthquakes.