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Volcanic Eruptions Comparison: Phreatomagmatic vs. Strombolian

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Volcanic Eruptions Comparison: Phreatomagmatic vs. Strombolian

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Questions and Answers

What is a Plinian Eruption characterized by?

Limited dispersion of ash

Highly explosive and violent blasts (correct)

Slow and steady lava flows

Low magma discharge rate

What is the main reason behind the eruption of volcanoes?

Seafloor spreading

Magma's high density compared to surrounding rock

Formation of bubbles in magma

Pressure build-up within the volcano (correct)

What factor affects magma's viscosity?

Magma's color

Magma's speed of flow

Magma's temperature (correct)

Amount of dissolved gases in magma

What type of eruption occurs when magma is thick and does not flow easily?

Explosive Eruption Signup and view all the answers

What scale is used to describe the size of explosive volcanic eruptions based on magnitude and intensity?

Volcanic Explosivity Index (VEI) Signup and view all the answers

What is one of the advantages of volcanoes mentioned in the text?

Generation of geothermal energy Signup and view all the answers

What type of eruption is characterized by fountain lava and periodic explosions?

Strombolian eruption Signup and view all the answers

Which type of eruption involves the contact between water and magma, resulting in explosive interactions?

Phreatomagmatic eruption Signup and view all the answers

What is a characteristic of Vulcanian eruptions?

Material traveling faster than 350 meters per second Signup and view all the answers

Why are Phreatomagmatic eruptions considered explosive?

Fragmentation due to water-magma interaction Signup and view all the answers

Which eruption type can produce base surges along with a large column of fine ash?