Dust devil above the crater (Photo: Tom Pfeiffer)
More on VolcanoDiscovery:
List and map of all volcanoes in Africa. Most volcanoes are located in the Great Rift Valley, but there are more.
: A third tectonic setting where volcanism occurs is believed to be the result of mantle plumes and not directly related to plate boundaries. So called hot spot volcanoes fall into this category.