0
It is because they contain viscous lava. Viscous lava flows slowly and thus hardens quickly. Some of the lava hardens on the vent, causing a blockage of the vent. The materials in the volcano eruption will force its way out, and it creates a loud 'bang' and the ground shakes violently.
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoThe explosive force of a volcanic eruption si driven by gas. Magma has some amount of gas trapped inside it under pressure. As the magma approaches the surface the lower pressure allows the gasses to bubble out of solution, like when a shaken can of soda is opened. If there is enough gas, these bubbles will expand rapidly and violently, resulting in an explosive eruption.
Wiki User
∙ 9y agoMuch of it has to do with the properties of the magma. Violent eruptions generally involve high-viscosity magma with a high gas content. Gas is trapped in the magma under high pressure. When the magma approaches the surface, the lower pressure allows the gas to be released and to expand violently, resulting in an explosive eruption. More viscous magma tends to hold more gas. If there is not much gas in the magma, there will not be much to drive a violent eruption. Sometimes, however, water can com in contact with magma and flash to steam, resulting in an explosion.
Add your answer:
Earn +20 pts
What kind of volcano erupts more violently than others?
Dormant volcanoes don't erupt at all. When volcanoes are dormant, are "asleep" and do not erupt for a while. actually yes dormant is asleep but they can erupt at any time your thinking extinct valcanos dont erupt
How many times does volcanoes go off?
It depends on the volcano. Some volcanoes can erupt very often, while others will only erupt once every hundred years.
Do volcanos erupt differently?
No, not all volcanoes would erupt the same way. Some volcanoes erupt by explosion while others barely trickle lava down the volcano.
What is volcano that hasent erupted in a while is called?
volcanoes that don't erupt in a while is called dormant.volcanoes that don't erupt anymore are called extinct.volcanoes that erupt regularly are called active.
Why are volcanoes that erupt infrequently more destructive then volcanoes that erupt continuously?
Volcanoes erupt infrequently more destructive and active than volcanoes that erupt continuously because the volcano that didn't erupt in a while had more pressure than the volcano that erupts constantly. When more pressure builds up, gas wants to get out as soon as possible. When it does, the magma comes out, it pushes and pushes out since all thee pressure builded up.
What kind of volcano erupts more violently than others?
Dormant volcanoes don't erupt at all. When volcanoes are dormant, are "asleep" and do not erupt for a while. actually yes dormant is asleep but they can erupt at any time your thinking extinct valcanos dont erupt
How many times does volcanoes go off?
It depends on the volcano. Some volcanoes can erupt very often, while others will only erupt once every hundred years.
Do volcanos erupt differently?
No, not all volcanoes would erupt the same way. Some volcanoes erupt by explosion while others barely trickle lava down the volcano.
What is volcano that hasent erupted in a while is called?
volcanoes that don't erupt in a while is called dormant.volcanoes that don't erupt anymore are called extinct.volcanoes that erupt regularly are called active.
Why are volcanoes that erupt infrequently more destructive then volcanoes that erupt continuously?
Volcanoes erupt infrequently more destructive and active than volcanoes that erupt continuously because the volcano that didn't erupt in a while had more pressure than the volcano that erupts constantly. When more pressure builds up, gas wants to get out as soon as possible. When it does, the magma comes out, it pushes and pushes out since all thee pressure builded up.
Why do some volcanoes erupt while others erupt quietly?
This is because of the time of volcano it is and the type of lava it excretes. A steep volcano will erupt with basaltic lava which is runny and can clog at the top. A shield volcano, however is different as the thick lava emitted just glops onward.
Are all volcanoes destructive?
Volcanoes are only destructive to people and property when they erupt. Volcanoes can lie dormant for decades before they erupt. The Hawaiian Islands were all formed from eruptions of volcanoes in the ocean.
Are volcanoes volcanoes before they erupt?
Yes they are. A volcano that is not erupting is called a dormant (meaning sleeping) volcano, while one that is erupting is called an active volcano.
What are volcanoes called which only erupt once in a while?
dormant, either in cative or only a few more times
What does dormant how to do with volcanoes?
A dormant volcano is a volcano that has not erupted for a while but has the possibility of doing so in the future. An extinct volcano is a volcano that will not erupt again.
What is lava flow?
It's the molten rock that comes out of volcanoes when they erupt and that streams downhill while it's still so hot that it is liquid.
Do volcanoes erupt 5 times a year?
On average there are about 50 volcanic eruptions recorded each year, but they are from different volcanoes. It is doubtful that any volcano would erupt 5 times every year. Volcanoes can enter into different phases of activity and no two volcanoes are alike. One volcano may erupt every few years while another may go thousands of years without erupting. A volcano may erupt many times in a relatively short time as part of a phase of activity or, in the case of kilauea, sustained a single continuous eruption for a long time.
