Difference between explosive and quiet volcanoes?

Outside of the kitchen, this means that the primary product of quiet eruptions is runny lava, while the most explosive eruptions spew forth not only thicker lava, but also rock fragments and noxious gases, which can pummel down the sides of the volcano at speeds of nearly 100 kilometers per hour (about 60 miles per ...

1. What is the main difference between a quiet eruption and an explosive eruption?
2. What is a quiet volcano?
3. What is the difference between explosive and effusive volcanoes?
4. Is a composite volcano quiet or explosive?
5. What type of volcano has a explosive eruption?
6. What makes an eruption more explosive?
7. Why do explosive eruptions occur?
8. Where are quiet volcanoes found?
9. What determines whether a volcano erupts quietly or explosively?
10. When a volcano erupts quietly what kind of mountain forms?
11. What is the meaning of explosive eruption?
12. Are shield volcanoes explosive?
13. What type of eruption is the most explosive?
14. What are the 3 types of volcano?
15. Which volcano is the least explosive?
16. Which volcanoes are more likely to explode?

What is the main difference between a quiet eruption and an explosive eruption?

Quiet eruptions produce two different kinds of lava: chunks called aa, or smooth coils called pahoehoe. Mt. Kilauea in Hawaii erupts quietly, producing low-viscosity lava flows. High-silica magma produces explosive eruptions.

What is a quiet volcano?

Dormant: An active volcano which is quiet, not presently erupting, but is expected to erupt in the future. Most of the major Cascade volcanoes are believed to be dormant rather than extinct.

What is the difference between explosive and effusive volcanoes?

If lava is flowing out of the volcano, we would call this an effusive eruption. On the other hand, when gas and broken fragments are shot up into the atmosphere, the magma has literally exploded before falling back to Earth. If the magma has been blown to pieces, we would call this an explosive eruption.

Is a composite volcano quiet or explosive?

Composite volcanoes are explosive, towering giants. Shield volcanoes quietly produce broad, massive structures through lava flows.

What type of volcano has a explosive eruption?

Composite volcanoes are tall, steep cones that produce explosive eruptions. Shield volcanoes form very large, gently sloped mounds from effusive eruptions. Cinder cones are the smallest volcanoes and result from accumulation of many small fragments of ejected material.

What makes an eruption more explosive?

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.

Why do explosive eruptions occur?

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! Lava flows are much more thick and sticky so do not flow downhill as easily.

Where are quiet volcanoes found?

The quieter, "effusive" volcanoes, like Iceland and Hawaii, are found mostly where plates are coming apart or in the middle of a plate. Let's carefully examine the edges of colliding plates to see why volcanoes might be found there.

What determines whether a volcano erupts quietly or explosively?

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.

When a volcano erupts quietly what kind of mountain forms?

A shield volcano is a gently sloping mountain. It forms when a volcano erupts quietly. Thin layers of lava build up slowly over a large area around the vent.

What is the meaning of explosive eruption?

In volcanology, an explosive eruption is a volcanic eruption of the most violent type. ... Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent.

Are shield volcanoes explosive?

Eruptions at shield volcanoes are only explosive if water somehow gets into the vent, otherwise they are characterized by low-explosivity fountaining that forms cinder cones and spatter cones at the vent, however, 90% of the volcano is lava rather than pyroclastic material.

What type of eruption is the most explosive?

A Plinian eruption is the most explosive of the eruption types. Mt. St. Helens eruption was a plinian eruption.

What are the 3 types of volcano?

There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes.

Which volcano is the least explosive?

The least explosive type of volcano is called a basalt plateau. These volcanoes produce a very fluid basaltic magma with horizontal flows. The form of these volcanoes is flat to gently sloping and they can occupy an area from 100,000 to 1,000,000 square kilometers.

Which volcanoes are more likely to explode?

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.