Catherine Joséphine "Katia" Krafft and her husband, Maurice Paul Krafft, were French volcanologists who died in a pyroclastic flow on Mount Unzen, in Japan, on June 3, 1991. The Kraffts were known for being pioneers in filming, photographing and recording volcanoes, often getting within feet of lava flows. Their obituary appeared in the Bulletin of Volcanology. Werner Herzog's documentary Into the Inferno mentions them.