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The explosive force of violent eruptions is driven by gas trapped in the magma under pressure. Mafic magma often has a relatively low gas content and so usually erupts in a non-explosive or mildly explosive.
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What does viscosity have to do with eruptions?
The viscosity of magma or lava will determine whether or not the eruption is explosive or quiet. Higher viscosity magma can result in explosive eruptions. Lower viscosity magmas tend to flow more freely.
Is a shield volcano quiet or loud?
No, they produce very explosive eruptions. They do not erupt much magma, instead exuding chunks of ash and semi-hardened igneous rock.
Does Hawaii experience effusive or explosive eruptions?
Occasionally, yes. Most of Kilauea's eruptions are effusive, however.
The volcanoes of Hawaii form fron thin basaltic magma that tends to erupt quietly What is one reason for the quiet eruptions?
Basaltic magma allows dissolved gases to bubble upward and escape
How does magma composition and the resulting eruption affect the form of a volcano?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
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.
Does thin magma cause explosive eruptions?
No, quiet eruptions.
Which magma type resulted in a quiet eruptions?
That would normally be magma with a low silica content.
What does viscosity have to do with eruptions?
The viscosity of magma or lava will determine whether or not the eruption is explosive or quiet. Higher viscosity magma can result in explosive eruptions. Lower viscosity magmas tend to flow more freely.
Is a shield volcano quiet or loud?
No, they produce very explosive eruptions. They do not erupt much magma, instead exuding chunks of ash and semi-hardened igneous rock.
What causes the difference between quiet and exploses eruptions?
It depends on how much silica is in the magma. If there is low-silica in the magma then the volcano will erupt quietly. If there is high-silica in the magma then the volcano will erupt explosively.
Does Hawaii experience effusive or explosive eruptions?
Occasionally, yes. Most of Kilauea's eruptions are effusive, however.
How can the composition of magma affect the way volcano erupts?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
Does mount rainer have quiet eruptions or explosive eruptions?
The mountain varies between the years depending on the current pressure inside and the positioning of the magma beneath. It changes in a fairly unpredictable way.
Cinder cone volcanoes produce quiet eruptions.?
No, they produce very explosive eruptions. They do not erupt much magma, instead exuding chunks of ash and semi-hardened igneous rock.
Do shield volcanoes produce quiet eruptions and explosive eruptions?
Shielf volcanoes generally produce "quiet" eruptions. Explosive eruptions are rare.
The volcanoes of Hawaii form fron thin basaltic magma that tends to erupt quietly What is one reason for the quiet eruptions?
Basaltic magma allows dissolved gases to bubble upward and escape
