What two main factors result in more violent eruptions?
A) not too much water and low enough viscosity
B) more water and higher viscosity of the magma
C) higher viscosity and narrow enough vent
D) strong rocks around the vent and more water
E) a large enough volcano with low-viscosity magma

Question

Quizplus · Accepted Answer

More water and higher viscosity of the magma result in more violent eruptions. The presence of water increases the gas content which leads to more explosive eruptions. High viscosity magma traps the gas bubbles within it, leading to a buildup of pressure which then results in explosive eruptions.

What Two Main Factors Result in More Violent Eruptions