Volcanologist

The scientists whose primary documented field is volcanic activity: Thomas Jaggar, Haroun Tazieff, Katia Krafft, Maurice Krafft, Giuseppe Mercalli and Robert Decker among them. Belongs here: a scientist whose primary contribution is the study, monitoring or classification of volcanic eruptions and their hazards. Does not belong here: a scientist whose primary field is seismology or general geology even where their career also touched volcanic study, held under that specialty instead.