There's a brilliant audio slideshow on the BBC website giving us an insight into the life and work of volcanologists. Dr Tamsin Mather from the University of Oxford's Department of Earth Sciences gives some interesting insights and commentates on a range of pictures.
Volcanoes affect regions around the world, notably the Pacific Ring with countries such as Chile, Indonesia and Japan. There are also volcanoes across Europe (Iceland, Italy etc), in Africa (Rwanda, Democratic republic of Congo) and the USA.
|USGS: Volcano Distribution Map|