Case study for Natural Hazards - VOLCANOES By William Wong
be described as being tectonic hazards that occur in many parts of the
world. The distribution of volcanoes is closely linked with the positioning
of the tectonic plate boundaries across the globe. Today there are about
500 active volcanoes in the world. The world map of volcanoes in your
atlas shows that the most volcanic activity occurs along the West coasts
of North and South America, (along the Rockies and Andes) and the coasts
of many Far East countries (in areas like Japan, China etc).
The positioning of these volcanoes coincide with major plate boundaries. E.g. the volcanoes along the West coast of North America are the result of the Juan de Fuca plate converging with the North American plate. Another example is the volcanoes formed in the Andes Mountains are a result of the convergence of the Nazca and South American plates. Other areas that have high volcanic activity are along the plate boundaries of the Eurasian and African plates.