Professor Sir Stephen Sparks CBE is Visiting Professor of Geology at Gresham College. He is also Chaning Wills Professor of Geology in the Department of Earth Sciences at the University of Bristol. He is one of the world's leading volcanologists and is widely recognised for his work in the field. His work is mainly focused on volcanic and igneous processes. He has also made contributions in fundamental fluid mechanics, sedimentology and risk assessment methodologies for natural hazards.