Image: Science Instructor Jon DehnJon Dehn is an associate research professor at the Alaska Volcano Observatory at the Geophysical Institute of the University of Alaska Fairbanks. Growing up in the midwest, Dehn was fascinated by fossils until reaching Arizona State University and discovering that paleontology meant long hours in a lab coat looking through a microscope. In 1983 he joined a field trip to Hawaii and experienced the eruption of Kilauea volcano first hand. He became hooked on volcanology. He went on to complete a bachelor's and master's degree at Arizona State. Dehn worked for a year with the Smithsonian Institution's Global Volcanism Program before accepting a Fulbright Scholarship to Germany for a PhD with noted volcanologist, Hans Schmincke. Dehn graduated in 1992, and went on to work for the Japanese Geological Survey in Sapporo on volcanoes in Hokkaido Japan. He came to AVO in 1997, and has since focused on volcanoes in Alaska, Kamchatka and Italy. He is affiliate faculty at the University of Hawaii as well as at the Open University in Milton Keynes, UK. His work focuses on physical volcanology and remote sensing of volcanic eruptions, mostly in the thermal infrared.

Dehn is serving as a STEP Science Instructor in 2008, when the featured topic is Earth Science.