Harry Glicken ( March 7 , 1958 – June 3 , 1991 ) was an American volcanologist . He researched Mount St. Helens in the United States before and after its 1980 eruption , and was very distraught about the death of fellow volcanologist David A. Johnston , who had switched shifts with Glicken so that the latter could attend an interview . In 1991 , while conducting avalanche research on Mount Unzen in Japan , Glicken and fellow volcanologists Katia and Maurice Krafft were killed by a pyroclastic flow . His remains were found four days later , and were cremated in accordance with his parents ' request . Glicken and Johnston remain the only American volcanologists known to have died in volcanic eruptions
1980 eruption
1980 eruption of Mount St. Helens
Harry Glicken