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If the magma has a high water content, then the volcano will most likely have an explosive eruption. Also, vocanoes can have explosive eruptions if the magma contains a large percentage of silica. Hope this helps!

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13y ago

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How viscosity affect volcanic eruptions?

Viscosity is how thick the magma is and this can impact on how much a volcano erupts and how it flows.


Describe how differences in magma affect volcanic eruptions?

It depends on the texture of the magma, if it is thick then it won't let the gases escape, and if it is liquidy then the gases will escape resulting in a nonexplosive eruption. If the magma is high in silica and water then it will be thick If the magma is low or has no silica or water then it will be liquidy. - Negehna 6th Grade


What determines the severity of volcanic eruptions?

The size of the magma chamber and the viscosity of the magma.


Where were the Hawaiian islands formed from?

volcanic eruptions and magma


Is magma a explosive eruption and why?

Magma is not an eruption. Magma is a mixture of molten minerals and dissolved gas that is underground. All volcanic eruptions, apart from phreatic eruptions, involve magma.


Do volcanic eruptions throw magma into the air?

yes drastically


What are 3 types of non-volcanic types of eruption?

Phreatic eruptions occur when water comes into contact with magma, causing a steam-driven explosion. Phreatomagmatic eruptions involve the interaction of water and magma to produce explosive eruptions. Surtseyan eruptions refer to shallow submarine or coastal volcanic eruptions that interact with water or ice, creating explosive activity.


Does low silica magma cause explosive volcanic eruptions?

Not usually. Explosive eruptions are more often to magma with high or moderate silica levels.


Why do volcanic eruptions differ?

The main cause of differences in volcanic eruption characteristics is due to the viscosity of the magma. High viscosity magmas are high in sticky silica which traps gas and produces explosive eruptions. Low viscosity magmas are low in silica and produce eruptions with far less energetic characteristics.


What do quiet lava eruptions generally result from?

Volcanic eruptions are always caused by magma. This applies if the eruption is quiet or explosive, or whether the magma is felsic or mafic.


Why are there so many different types of magma found in volcanic eruptions?

There are different types of magma found in volcanic eruptions because they have varying compositions of minerals and gases, which are influenced by factors like the depth of the magma source, temperature, and the presence of water and other substances. These variations lead to different types of volcanic eruptions with varying levels of explosiveness and lava flow.


Violent volcanic eruptions are common where magma has?

Violent volcanic eruptions are common where magma has a high gas content and viscosity. The pressure from trapped gases builds until it explosively releases, causing explosive eruptions like Plinian or Pelean eruptions. These eruptions often result in ash plumes, pyroclastic flows, and lahars.