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Volcanoes are one of the most destructive yet fascinating geological land forms in our natural environment. They consist of a fissure in the earth’s crust above which a cone of volcanic material has accumulated. The cone is formed by the deposition of molten or solid matter that flows from the interior of the earth through an indented vent, called a crater, which is found at the top of the cone. In this report I will discuss different states of volcanic activity, different forms of volcanoes and their properties and locations. Some volcanoes are more active than others. Some are even in a state of constant eruption an example of this is Izalco, located in El Salvador, it first erupted in 1770 and has been in a state of eruption ever since. In a belt that circles the Pacific Ocean their are many active and erupting volcanoes. For obvious reasons this area is referred to as the Ring of Fire. The activity of the volcanoes varies , for example, Vesuvius will continue in a state of moderate activi