Table of Contents
What determines if an eruption will be explosive or nonexplosive explain?
The amount of dissolved gas in the magma provides the driving force for explosive eruptions. The viscosity of the magma, however, is also an important factor in determining whether an eruption will be explosive or nonexplosive.
What two factors determine whether an eruption will be explosive or quiet?
Volcanoes
| Question | Answer |
|---|---|
| These two factors control whether an eruption will be explosive or quiet? | Water vapor and silica |
| Magma that is low in silica and produces nonexplosive eruptions is called? | basaltic |
| Magma that is high in silica and produces explosive eruptions is called? | granitic |
What is quiet volcanic eruption?
Quiet Eruptions Volcanoes that have very hot, low-silica magma generally erupt quietly. In a quiet eruption, lava erupts in a stream of low-viscosity lava, called a lava flow. Lava flows from a quiet eruption can travel for great distances.
What determines the type of volcanic eruption?
Types of eruptions. The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano.
What causes an explosive eruption?
Explosive eruptions occur where cooler, more viscous magmas (such as andesite) reach the surface. Dissolved gases cannot escape as easily, so pressure may build up until gas explosions blast rock and lava fragments into the air!
What four factors determine the type of volcanic eruption?
The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano.
What type of volcano is characterized by a quiet eruption?
Shield volcanoes, those with broad, gentle slopes, produce the quietest eruptions. The Hawaiian Islands are not only home to active shield volcanoes, but the chain is actually built entirely by them. The two most common types of volcanoes known for producing explosive eruptions are cinder cones and stratovolcanoes.