are the only American volcanologists known to have been killed by a volcanic eruption. Posthumous report At the time of his death, Glicken had been seeking to publish his doctoral dissertation in one piece, having earlier published elements as shorter articles. He had already defined the criteria for debris avalanches on the slopes of volcanoes, and authored several publications on the subject; Swanson named him one of the foremost experts in the field. After the 1980 eruption of Mount St. Helens, research in the niche area grew as more studies identified debris at well-known volcanoes. His work on flows at Mount St. Helens is considered the most complete in the field to date. It was later published in 1996 as a single report by his acquaintances Carol Ostengren, John Costa, Dan Dzurisin, and Jon Major, among others, at the United States Geological Survey. In his preface to Glicken's publication, Major comments that "the Mount St. Helens deposit will never be mapped in such detail again." Glicken's report is titled "Rockslide-debris Avalanche of May 18, 1980, Mount St. Helens Volcano, Washington". It comprises his extensive laboratory and field work, supplemented by photographs of the eruption, writings that describe St. Helens before the eruption, and references to previous publications, including Voight's work. In the report, Glicken constructed a map of the landslide deposit at a scale of 1:24000, followed by a lithologic map describing rock varieties at a scale of 1:12000. The report also provides a conclusion for the movement of each slide block, using photographs and other data to estimate the velocity of each landslide, describing the composition of each, and recounting the interactions between blocks. Tributes and legacy Despite their appreciation of his work, many of Glicken's associates considered him eccentric and highly disorganized. Chatty, noted for being extremely sensitive, Glicken also paid meticulous attention to detail. One of his friends writes, "Harry was a character his whole life. ... Everyone who knew him was amazed he was such a good scientist." Regarding Glicken's driving habits, the same acquaintance describes him as "a cartoon character" who "would drive at full speed down the road, talking about whatever was important to him, and ... come to a four-way stoplight and he'd sail through it, never knowing he'd just gone through". Glicken's father said in 1991 that his son died pursuing his passion, and that he was "totally absorbed" with volcanology. United