Types of Volcanic Eruptions
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Questions and Answers

What type of volcanic eruption produces lava flows exclusively?

  • Strombolian
  • Plinian
  • Hawaiian (correct)
  • Vulcanian

Which type of eruption results in the sudden release of built-up pressure producing pyroclastic debris?

  • Strombolian
  • Vulcanian
  • Hawaiian
  • Plinian (correct)

What type of eruption is characterized by sustained fissure eruptions producing curtains of basaltic lava?

  • Hawaiian (correct)
  • Plinian
  • Vulcanian
  • Strombolian

Which type of eruption produces low-viscosity basaltic lava flows and fountains?

<p>Hawaiian (C)</p> Signup and view all the answers

What type of eruption results from the bursting of clumps of gas bubbles at the surface?

<p>Strombolian (B)</p> Signup and view all the answers

Which type of eruption results from more viscous lava, slowing down bubble formation and clogging up conduits?

<p>Vulcanian (B)</p> Signup and view all the answers

What type of eruption results from bursting gas bubbles at the surface, throwing up clots of lava?

<p>Strombolian eruption (D)</p> Signup and view all the answers

Which classification of eruption occurs in a shallow body of water and is characterized by strong explosions due to magma-water interaction?

<p>Surtseyan Eruption (D)</p> Signup and view all the answers

What volcanic eruption type is the result of slow bubble formation and clogging of conduits leading to a volcanic explosion?

<p>Vulcanian Eruption (D)</p> Signup and view all the answers

Which type of eruption evolves from Icelandic eruptions and produces low-viscosity basaltic lava flows?

<p>Hawaiian Eruption (C)</p> Signup and view all the answers

What causes Strombolian eruptions to be accompanied by high concentrations of pyroclastic debris?

<p>Bursting gas bubbles at the surface (D)</p> Signup and view all the answers

Which eruption type is driven by violent thermal contraction of magma when it interacts with water?

<p>Phreatomagmatic Eruption (D)</p> Signup and view all the answers

What drives purely steam-driven eruptions?

<p>Expansion of water into steam (D)</p> Signup and view all the answers

Which type of eruptions produce Hawaiian volcanoes over time?

<p>Effusive eruptions (C)</p> Signup and view all the answers

What is the main source of pressure behind explosive volcanic eruptions?

<p>Decompression of gases (D)</p> Signup and view all the answers

How does the amount of gases affect the force of the explosion in magmatic eruptions?

<p>More gas increases the force (B)</p> Signup and view all the answers

True or False: Vulcanian eruptions generally have higher eruption columns compared to Strombolian eruptions.

<p>True (C)</p> Signup and view all the answers

Which eruption is an example of a Plinian eruption?

<p>1991 Pinatubo eruption (D)</p> Signup and view all the answers

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