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Using tree damage to characterize the evolution of dynamic pressure within the 18 May 1980 pyroclastic density current of Mount St. Helens
(2020-08-17)
On 18 May 1980, Mount St. Helens erupted a laterally directed pyroclastic density current (PDC) that decimated ~600km2 of forest, referred to as the blowdown zone. The head of the current contained the peak dynamic pressure, ...