What is the direct control on whether a volcano will erupt violently or quietly send out a few flows?
A) the duration of the quiet interval since its last violent eruption
B) what the total volume of the volcano has at the time of eruption
C) the composition of the magma, its temperature, and dissolved gas content
D) the population density

Question

Quizplus · Accepted Answer

The composition of the magma, its temperature, and dissolved gas content directly influence a volcano's eruption style. High gas content and more viscous magma typically lead to more explosive eruptions, while low gas content and less viscous magma result in quieter lava flows.

What Is the Direct Control on Whether a Volcano Will