Introduction to Volcanism (Alt + 1)
Eruptions and Hazards (Alt + 2)
Volcanic Landforms and Features (Alt + 3)
Monitoring Volcanic Activity (Alt + 4)
National Parks with Volcanoes (Alt + 5)
Effusive eruptions and their hazards Volcanic hazards
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Volcanism Main Index (Alt + I)
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Explosive Eruptions

Explosive eruptions occur when volatile (unstable and reactive) magma and volcanic gases are released. Magma can be under extremely high pressures due to its volume or its content of dissolved gases.

Explosive eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. Lahars, pyroclastic flows, ashfall, and many other volcanic hazards are commonly associated with explosive eruptions. Explosive eruptions are very dangerous. Basically, any form of hazard can occur.

Case studies for Halekala National Park
Case studies for Wrangell-St. Elias National Park and Preserve