3. tectonics
tectonics
Mount St. Helens is located in
the Cascadia Subduction Zone.
It is situated on the boundary
between the Juan de Fuca Plate
and the North American Plate.
4. Type of volcano
Type of volcano
Mount St. Helens is a
stratovolcano.
Characteristics include steep
slopes, periodic explosive
eruptions, and the presence of
a central vent.
5. frequency of
frequency of
eruption
eruption
Mount St. Helens has experienced major
eruptions in 1980, 2004, and other smaller
eruptions.
Historical records indicate a history of both
explosive and effusive eruptions.
7. enviromental impact
enviromental impact
Destruction of surrounding forests and ecosystems, ashfall affecting air and water quality
and landslides and lahars leading to changes in topography.
social impact
social impact
Evacuation of nearby communities, loss of lives and injuries and displacement of
residents and long-term effects on mental health.
Economic impact
Economic impact
Infrastructure damage, including roads and bridges, losses in the timber industry
and cost of recovery and rebuilding.
8. Short-term consequences
Short-term consequences
Immediate closure of airspace due to ash clouds.
Emergency response and search-and-rescue operations.
long-term consequences
long-term consequences
Changes in the landscape, with the formation of a new crater.
Slow recovery of ecosystems.
Continued monitoring for potential eruptions.
