Volcanoes by FlaxmanR

Question 3

Harry Glicken, who died in a 1991 eruption at Japan’s Mount Unzen, is one of only two American volcanologists known to have died while on the job. The first, seen here in a photograph taken by Glicken himself, was David A. Johnston, who replaced Glicken at the Coldwater II observation post just thirteen hours before the eruption of what volcano?

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Mount St. Helens