What Determines If An Eruption Will Be Explosive Or Nonexplosive?
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 factors determines whether an eruption will be explosive?
Volcanic eruptions can be explosive sending ash gas and lava high up into the atmosphere or the magma can form lava flows known as effusive eruptions. Whether an eruption is explosive or effusive largely depends upon the amount of gas in the magma.
What are the two factors that determine if an eruption will be quiet or explosive?
Two important factors control whether an eruption will be explosive or quiet. One factor is the amount of water vapor and other gases that are trapped in the magma. The second factor is how much silica is present in the magma.
What is one factor that determines how explosive a volcanic eruption quizlet?
A magma with high silica (>60%) will be quite viscous and so the eruption will be violent. One other factor is the amount of dissolved volatiles in the magma (chlorine gas water and other gases). A magma with a lot of dissolved gases will form a lot of large bubbles.
What determines the type of volcanic eruption?
The style of eruption depends on a number of factors including the magma chemistry and content temperature viscosity volume and how much water and gas is in it the presence of groundwater and the plumbing of the volcano. … For more information on volcanic hazards which can be produced by our volcanoes click here.
What are three factors that determine how violently or quietly a volcano erupts?
The primary factors that determine whether a volcano erupts violently or quietly include magma composition magma tempera- ture and the amount of dissolved gases in the magma.
Which volcano will produce an explosive eruption?
Composite volcanoes are some of the most dangerous volcanoes on the planet. They tend to occur along oceanic-to-oceanic or oceanic-to-continental boundaries because of subduction zones. They tend to be made of felsic to intermediate rock and the viscosity of the lava means that eruptions tend to be explosive.
Which of the following will determine if a volcanic eruption is explosive or quiet quizlet?
A magma’s viscosity is directly related to its ______. Which if the following factors helps determine whether a volcanic eruption will be explosive or relatively quiet? The amount of dissolved gases in the magma temperature of the magma and composition of the magma. You just studied 50 terms!
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 causes a volcano to explode?
What type of eruption is the most explosive?
What determines if a volcano erupts violently or quietly?
What primary factors determine whether a volcano erupts violently or quietly? Magma composition magma temperature and the amount of dissolved gases in the magma. … Located at the summit of many volcanoes is a steep-walled depression.
What makes volcanoes erupt violently or just bubble over quietly?
Volcanoes erupt explosively or quietly depending on the characteristics of the magma. Magma can vary in viscosity the resistance to flow. Magma with high viscosity is thick and resists flowing. Magma with low viscosity is thin and flows easily.
What causes quiet and explosive eruptions?
What causes an eruption to be explosive? A volcano erupts explosively if its magma is high in silica. … In a quiet eruption the magma is low in silica allowing the magma to flow out gently. In an explosive eruption the magma is high in silica which causes the magma to be thick and sticky.
Does the height of a volcano determines its explosive power?
All volcanoes have a magma chamber where magma is stored and builds up. They also have a central vent which the magma travels through to get to the surface. At the top of the volcano is a crater. … The height of a volcano determines its explosive power.
Which of the following characteristic of magma determines its explosiveness?
Viscosity together with the amount of gas dissolved in magma can determine the explosivity of the eruption. More viscous magma with volatiles is more explosive than less viscous magma where gases can bubble out relatively easily.
What two factors control the explosiveness of an eruption quizlet?
What two factors control the explosiveness of an eruption? The amount of water vapor and silica in the magma.
What are the factors that control whether an eruption is explosive or nonexplosive explain your answer?
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 factors determine whether volcanic activity will be a lava flow or pyroclastic eruption?
the primary factors that determine whether a volcano erupts explosively or quietly include characteristics of the magma and the amount of dissolved gases in the magma.
What factor best determines what types of volcano will form in a given area?
The most important factor in determining the shape or type of volcano is the viscosity of the magma that builds the volcano. Viscosity is a measure of a fluid material’s resistance to flow and results from the internal forces and friction between the material’s molecules.
What are the causes of volcanic eruption Wikipedia?
- Gas release under decompression causing magmatic eruptions.
- Thermal contraction from chilling on contact with water causing phreatomagmatic eruptions.
- Ejection of entrained particles during steam eruptions causing phreatic eruptions.
What happens during a volcanic eruption?
A volcano is a vent in the Earth’s crust from which eruptions occur. … When volcanoes erupt they can spew hot dangerous gases ash lava and rock that can cause disastrous loss of life and property especially in heavily populated areas.
What are causes of volcano?
What kind of volcanic eruption is least explosive?
What are the stages of a volcano eruption?
What are the factors responsible for quiet eruptions?
Silica-rich felsic magma can trap a lot of gas. … Silica-poor mafic magmas trap little gas. These magmas produce quiet eruptions.
Would quiet eruptions or explosive?
Would quiet eruptions or explosive eruptions be more likely to increase the height of a volcano? Why? Quiet eruptions because they usually build up layers of lava whereas explosive eruptions often blow up the top of a volcano decreasing its height.
What are the three factors to consider in identifying the category of a volcano?
- The volume of volcanic products.
- The interval length between eruptions.
- The composition of volcanic products.
- The variety of volcanic eruption types.
- The geometry of the vent.
- The environment into which the volcanic products are erupted.
How can a scientist predict how explosive the eruption of a volcano will likely be?
Scientists use seismographs that record the length and strength of each earthquake to try to determine if an eruption is imminent. Magma and gas can push the volcano’s slope upward. … But ground swelling may sometimes create huge changes in the shape of a volcano.
What is the relationship between the type of eruption to the shape and height of volcano to be produced?
Molten rock is less dense than the surrounding rock so it is buoyant and rises just like hot air. Each eruption can produce layers of lava that will later become volcanic rock. These layers build the volcano. Depending on how viscous the lava is will depend on the shape.
What are the characteristics of magma that affects the explosiveness of a volcanic eruption?
More crystals in the magma enable more gas bubbles to form and so they make an eruption more explosive. The rate at which pressure is reduced also affects the explosiveness. If magma moves slowly toward the surface gases in the magma have more time to escape.
Which characteristics of magma does not determine its explosiveness?
Non explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). If the viscosity is low non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When magma reaches the surface of the earth it is called lava.
What kind of volcano formed from a violent eruption with a narrow base and steep sides?
Stratovolcanoes have relatively steep sides and are more cone-shaped than shield volcanoes. They are formed from viscous sticky lava that does not flow easily. The lava therefore builds up around the vent forming a volcano with steep sides.
What two factors control whether an eruption will be explosive or quiet?
| 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 |
Volcanic Eruption | Types Of Eruption: Explosive And Effusive | Theory Explained.
Volcanic eruption explained – Steven Anderson
What If the Yellowstone Volcano Erupted Tomorrow?
The explosive and nonexplosive volcanic history near Balanced Rock southern Idaho