What is Volcano?

volcano

 

Volcano is an art of nature that has mystified scientists and photographers for decades as scientists struggle to understand what makes them erupt while photographer risk their safety and lives to get as close to an erupting volcano as possible to catch mesmerizing images of them in action. From the outside, a volcano looks exactly like a mountain would with a tall conical shape.  However, inside the mountain there is a vent or a crater that connects magma or molten rock that is found deep under the earth’s surface to the top of the mountain.

When the magma travels through the vent and erupts outside the volcano, it is called lava and in addition to lava, the volcano can spit out gases and pieces of rock. Geologists and scientists often study volcanic eruptions but they can be sudden, unexpected and destructive since the flowing lava will destroy anything and everything within its reach.  The statuses of volcanoes can be of three types: dormant, extinct and active.  A dormant is a volcano that has not erupted for a very long time but there are chances that it might erupt again in the future. A volcano that is extinct has no possibility of erupting anytime in the future while an active volcano erupts regularly, normally once every couple of years or even more often than that.

Volcanic eruptions happen because of the high temperature that exists under the surface of the Earth. This high temperature can cause the Earth’s mantle to melt into molten rock or magma. Since this is a denser and lighter form, it has a tendency to float upwards to the magma chambers. Later on, this magma is likely to push itself upwards towards the vent of the volcano and cause an eruption. Apart from the buoyancy of the magma, the pressure of the gases that becomes dissolved in the magma is another reason why the magma is pressurized to push upwards. In addition, when the quantity of magma in the magma chambers increases there is likelihood that magma will rise upwards causing an eruption.

Volcanoes can be different as well, for instance, shield volcanoes have wider rims, gentle slopes and their lava is very hot and very runny. On the other hand, composite volcanoes have steep slopes and thick lava. The pressure in this kind of lava can build up over time so when the volcano does erupt, the scene is spectacular when all the concentrated pressure is released in the form of lava, gases and hot rocks.

 

Volcano Facts

A volcano, if simply defined is a mountain in a conical shape and has a vent in the center from where lava, hot vapor, rock pieces and gas are released at the time of eruption.  They are actually considered to be an opening on the surface of the Earth, which allows ash, magma and gas to escape from the under the surface. Such a structure can be very deadly if proper actions are not taken to deal with the eruption. jawatan kosong There are quite a few facts that are known about volcanoes.  In this world, actually in the past 10,000 years, there have been almost 1,500 active volcanoes to erupt on the planet.  kerja kosong Currently, the biggest volcano on Earth can be found in Hawaii, named Mauna Loa.  If you look at it in terms of origin, the Earth contains more than an 80% content of a volcanic surface. There are different types of volcanoes even though most of them are made from the same content – magma.

One of these types is the shield volcano. These volcanoes have low viscosity lava flows that flow for long distances. Stratovolcanoes are made from different types of lava and their eruptions, rock and ash shoot up to large heights. The third type of volcano is the cinder cone volcano. These are comparatively smaller than usual, and they come from eruptions of short-time eruptions, making a cone of only 400 meters in height.

 

 

When do volcanoes erupt?

If you look 30 feet under the ground you walk on, you will find the mantle of the Earth. This area is made of intensely hot rock and goes down the core of the Earth. This area is hot in temperature which makes it possible for molten rock to squeeze out in the form of giant bubbles, which are given the name the magma chambers. The magma is lighter in weight than the rock around magma so it eventually rises from between cracks in the crust of the Earth. When this matter reaches the surface, it erupts out in the form of lava, gasses, ash and rock. Pulau Perhentian This liquid is called magma when it is inside the landform, known as lava once it comes out into the open.

Some of these landforms can take very long, almost thousands of years. Then there are those that can form just overnight. For example, a cinder cone volcano (called Paricutin) was discovered in some Mexican farmland in February 1943. Test Contactor Within a few days, a week to be exact, it became five stories tall, reaching 336 meters tall by the end of the year. By the year, it grew to 424 meters, which is considered fast in geology.

 

Volcano latest news

Volcanoes are both a majestic beauty of nature and a terrible force of destruction, which is why geologists and experts around the world monitor and study volcano latest news to predict their eruptions and plan accordingly. It is important so the buildings and civilization in the areas near the volcano can be protected from the destruction of the lava.

The Volcano latest news revolves around the Nyamuragira volcano in the Demographic Republic of Congo where volcanic eruptions began on 6 November 2011. This volcano is deemed the most active one in the entire region of Africa covering a total area of 800 km. Initially as the eruptions began, a 1 km long fissure was made and eventually the lava fountains reached a height of 400 m to form a new cone like structure. However, images and Nyamuragira volcano latest news reveal that lava was shown to be flowing on flat land north from the fissure. In addition to this, park rangers reported that a sulphur-dioxide plume as a result of the eruption was seen extending west of the volcanic eruption site.

The volcanic eruptions at Nyamuragira volcano continued on 15th of November 2011. According to volcano latest news, the lava fountains increased in height and the volcano showed no signs or eruption abatement. In addition to this, on 19 November 2011, the lava started to cover an area of 11.5 km steadily advancing towards the north of the region, within the area of the Kalengera-Tongo road. Tioman There is still a distance of 5 km between the lava flow and the road and as the lava flow speed is decreasing over days, the park rangers are hoping that lava flow will not reach the road itself. As far as the animal habitat in the area is concerned, gorillas are found about 20 km from the eruption site in the Virunga ranges that have not been affected.

According to volcano latest news, the Nyamuragira volcano has a history of eruptions between 1865 and 2011 and on an average; it erupts once every three and a half years.  However, this has increased since 1980 since the volcano has been erupting once every two years. e commerce malaysia The Nyamuragira also erupted only last year in 2010 in January, which continued for days spreading in the surrounding areas. Sometimes the lava reaches the nearby roads, the gas emissions cause health problems for people and ashes contaminate the air and drinking water in the region as well.

 

Volcanoes and Earthquakes

Volcanoes are created primarily by hot magma but that does not mean there are not different types of volcanoes. The first is a shield volcano that has a lava flow with a low viscosity. Viscosity is used to describe the state of a liquid, being thick and sticky.  malaysia web design However, this thick, hot liquid will flow for a dozen kilometers. The next type of volcano is Stratovolcanoes that are made from different types of matter, matter meaning rock, ash and lava, and their eruptions usually shoot up to high heights. The last type of volcano is usually of a smaller size. These are known as cinder cones. They are formed by small and short eruptions and only make a cone that is usually sized up to 400 meters.

Volcanoes are formed by a simple reaction. design web pages Magma weighs lighter than the solid rock that surrounds the magma. Because it is lightweight, the magma rises and makes it way up towards the surface. It collects into something that is called a magma chamber. At some point, it eventually finds its way through some cracks or other weak surfaces within the volcano with quite some force. This leads to an eruption, with lava blasting out all over the place, combined with rock, ash and volcanic gases.

An earthquake is different from a volcano.  farouk An earthquake, which is also called a tremor, is caused by an unexpected release of energy within the crust of the Earth that eventually leads to seismic waves. These waves are energy waves that travel through Earth because of an earthquake. Earthquakes occur when the plates of the earth start moving due to a wave of energy leading to shaking the ground with a noticeable force.  Within one year, there are about half a million earthquakes that occur all over the world. Out of the total 500,000 earthquakes that can be detected by scientific tools, only 100,000 of these are felt and 100 caused damage.

These two have a relation to an extent. Earthquakes may occur in places where volcanoes exist and they can take place in that specific region as well. These earthquakes occur by movements in the Earth’s plates and movement of magma within a volcano.  They may sometimes play the role of an early warning of an eruption of a volcano, which was the case with the eruption of Mount St Helen in the year 1980. Such a natural disaster usually helps to locate the exact location of a volcano because earthquakes that occur in such a place are caused by hot magma that flows there.

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