Dr. Sung-Hyo Yun is a Professor at the Department of Earth Science Education, Pusan National University. He obtained his Bachelor of Science diploma in 1980. at the College of Education, PNU and his Master of Education diploma in 1982. from Graduate School, PNU. Dr. Yun received his PH.D. in 1987. from Graduate School, PNU (Geology – Volcanology). Dr. Yun was president of the Petrological Society of Korea and the Korean Society of Volcanic Hazards Mitigation. He has contributed to the knowledge of Baekdousan volcano (China and Korea(North) border with close collaboration with Chinese Volcanologists).