What factors determine if a volcanic eruption will be explosive or quiet?
A. The amount of water vapor and other gases present is one factor that determines whether a volcanic eruption will be quiet or explosive.
What characteristics make a volcanic eruption violent?
A volcano's explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.
What determines the severity of volcanic eruptions?
The Volcanic Explosivity Index (VEI) is a scale that describes the size of explosive volcanic eruptions based on magnitude and intensity. The numerical scale (from 0 to 8) is a logarithmic scale, and is generally analogous to the Richter and other magnitude scales for the size of earthquakes.
What are the characteristics and conditions of a volcano you must look for to predict an eruption?
How can we tell when a volcano will erupt?
- An increase in the frequency and intensity of felt earthquakes.
- Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground.
- Subtle swelling of the ground surface.
- Small changes in heat flow.
- Changes in the composition or relative abundances of fumarolic gases.
Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?
Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent? It is determined by the primary factors of the magma's Temperature, its Composition, and the amount of Dissolved Gases it contains. The viscosities of magmas increase with increasing percentages of silica.
What is the weakest volcano?
The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan. The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called Ultra-Plinian.
What causes quiet and gentle eruptions?
Quiet Eruption A volcano erupts quietly if its magma is low in silica. Low-silica magma is thin and runny and flows easily. The gases in the magma bubble out gently. Low-silica lava oozes quietly from the vent and can flow for many kilometers.
What type of volcano has a gentle eruption?
Shield volcanoes Shield volcanoes: gentle slopes; runny lava; lava flows quickly; lava may flow far; erupt less violently.
What are signs that a volcano is about to erupt?
How can we tell when a volcano will erupt?
- An increase in the frequency and intensity of felt earthquakes.
- Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground.
- Subtle swelling of the ground surface.
- Small changes in heat flow.
- Changes in the composition or relative abundances of fumarolic gases.
What are the 5 characteristics of a volcano?
The five characteristics of a composite volcano involve their lava type, shape, composition, eruption type, and duration between eruptions. The lava… See full answer below.
Which of the following factors help determine whether a volcanic eruption will be violent or relatively quizlet?
Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent? It is determined by the primary factors of the magma's Temperature, its Composition, and the amount of Dissolved Gases it contains. The viscosities of magmas increase with increasing percentages of silica.
What type of eruption is the weakest?
The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan. The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called Ultra-Plinian.
Was Mount Everest a volcano?
1:066:51What If Mount Everest Were an Active Volcano? – YouTubeYouTube
Why are some volcanic eruptions gentle and others violent?
The two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma. Hawaiian volcanoes tend to erupt basalt, which is low in viscosity and low in gas content (about 0.5 weight percent).
What type of volcano lava can flow gently and violently?
Shield volcanoes Shield volcanoes: gentle slopes; runny lava; lava flows quickly; lava may flow far; erupt less violently.
Is there a warning before a volcano erupts?
An increase in the frequency and intensity of small earthquakes is another signal that a volcanic eruption may occur. Low-frequency volcanic earthquakes result from the breaking of brittle rocks and cracking of the Earth's surface due to the underground movements of fluid, magma and gases.
What are the 3 main features of a volcano?
The main features of a volcano include the magma chamber, vents, craters and slopes.
Which of the following is a major factor in determining whether a volcanic eruption will be violent explosive or relatively quiescent effusive )?
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.
Which volcano is the least explosive?
Answer and Explanation: Shield volcanoes tend to be the least explosive volcanoes.
What is a periodic weak to violent eruption characterized by Fountain Lava?
A periodic weak to violent eruption characterized by fountain lava. Pinatubo Volcano in Zambales. An example of Plinian eruption. An example of Vulcanian Eruption.
Are bodies still on Everest?
While some bodies have been removed, it is estimated that over 100 remain on the mountain. In addition to bodies, discarded climbing gear, oxygen bottles, and other detritus from years of dangerous expeditions litter the mountainside, earning Everest yet another unofficial title: "the world's highest trashcan."
Can you fly to Mt Everest?
Tim Morgan, a commercial pilot writing for Quora says aircraft can fly above 40,000 feet, and hence it is possible to fly over Mount Everest which stands at 29,031.69 feet. However, typical flight routes do not travel above Mount Everest as the mountains create unforgiving weather.
What happens inside a volcano before it erupts?
Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth's surface.
What are the 3 main causes of volcanic eruptions?
Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.
Why are some volcanic eruptions explosive and others not?
Some volcanic eruptions are explosive and others are not. The explosivity of an eruption depends on the composition of the magma. If magma is thin and runny, gases can escape easily from it. When this type of magma erupts, it flows out of the volcano.
Which 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.
What type of volcano has the least violent eruption?
Strombolian and Hawaiian eruptions These are the least violent types of explosive eruptions.
Which of the following characteristics of magma mainly affect the explosiveness of volcanic eruption?
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.
Who Is Sleeping Beauty on Everest?
Francys Arsentiev, not an experienced climber, would tragically become known as Sleeping Beauty on Mount Everest following her tragic death in 1998. Arsentiev and her husband Sergei, a skilled and experienced climber, both attempted to tame Everest without the help of suppemental oxygen.
How do mountaineers poop?
Most climbers therefore use either poop tubes or wag bags when they're climbing snowy high altitude peaks.