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1980 Eruption
Debris Avalanche
Lahars
Lateral Blast
Scorch Zone
Ashfall Zone
Pyroclastic Flows
Streams
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Animals
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Scorch Zone
When the blast slowed to a point where it no longer knocked trees over the hot gases ramped skyward.
This left a narrow zone of standing dead trees many of which were salvaged due to concerns about fire and insects.
Young plantations were also scorched by blast gases.
The turbulent blast felled trees and left behind patches of standing dead trees in the shelter of steep ridges.
The bast moved like a roller coaster, skipping up and over steep ridges. Many trees were snapped off at ridge height.
On the edge of the scorch zone, broadleaf trees like this big-leaf maple were able to sprout new leaves.
After the eruption, there were few signs of life in the scorched forest. [2 years after eruption]
Fireweed and other early successional species colonized quickly. [4 years after eruption]
In some areas, sapling-sized trees managed to survive buried beneath deep snowbanks.
The combination of a snow protected understory and standing dead trees has produced highly productive habitat.
A new productive forest is rising from the ghost forest created by the eruption.
Standing dead forest with snow-protected understory trees and shrubs. [4 years after eruption]
Shrubs and smaller plants take old. [7 years after eruption]
Standing dead trees lose branches. [17 years after eruption]
Many dead trees have fallen, a new forest rises. [30 years after eruption]
Standing dead forest with no snowpack at time of eruption. [3 years after eruption]
A landslide on steep hillside fells standing dead trees and fireweed establishes. [9 years after eruption]
Grasses and other plants take hold. [15 years after eruption]
Many dead trees have fallen, a new forest rises. [24 years after eruption]
The outer edge of the blast zone is defined by standing dead trees scorched by hot gases.
Large areas of scorched forest were salvaged due to fears of fire and insect damage. [3 months after the eruption]
Standing dead trees inside the monument provide excellent habitat for a variety of animals.
The dead trees provide ample nesting habitat and food in the form of colonizing insects.
Developing understory vegetation adds to habitat suitability.
Small trees and shrubs that were pressed flat and buried under snow were protected from blast gases.
The combination of standing dead trees and a young forest have made excellent habitat for birds.