Taking a Look at Volcanoes

Anpother factor that can have an impact on the level of hazard posed by a volcano is the type of plate margin on which it occurs. Volcanoes occuring at constructive plate boundaries are usually much less violent than those occuring at destructive plate boundaries. This is because the magma produced by plates moving apart is Basic, and therefoe has a low viscosity, allowing it to flow easily. The lava is produced from a central vent or fissure and erupts regularly but not usually violently. Also,constructive plate boundaries are often found under the sea and create submarine volcanoes, such as along the Mid-Atalntic ridge, so pose few threats to humans. As a result, the hazards posed by volcanoes at constructive plat eboundaries is relatively low. However, the subduction of one plate under another at destrctive plat eboundaries can form an acidic magma chamber, due to the build up of intense heat. Acidic magma is very viscous and resisitant to flow, meaning that there is often a huge build up of pressure, which can result in very violent and dangerous eruptions involving ash and pyroclastic flow. This can pose a a serious hazard. Pyroclastic flowsa are extremely dense, containing toxic gases at very high temperatures, and can move at speeds over 100km/h. The consequences of such an unpredictable hazard can be extremely seruous

Another physical factor is snow; if a volcano is snow capped, like Eyjafjallajokull, then the lahars and flash floods become a greater hazard. The flooding in Iceland in 2010 caused 700 people to be evacuated. Without the snow then lahars and floods may not be a problem at all.

Furthermore, acid magma is more likely to produce clouds of smoke and ash due to the explosive nature of the eruption it causes, than thinner, basic lava. Ash clouds, such as the one caused by the Icelandic volcano when it erupted in April 2010, which caused severe disruption to European air space, causing thousands of flights to be cancelled due to concerns over the hazards posed to air passengers travelling through the ash cloud.

Volcanoes are in fact important because without volcanoes the atmosphere wouldn’t have its oxygen rich properties. Many of years ago, Earth’s atmosphere was swarm with rock-forming minerals of the earth 's crust. During earlier volcanic eruptions many gasses enters into the earth atmosphere. Carbon dioxide, water vapor and many other gases

Mt. St. Helens included many details on volcanic eruptions. Volcanoes spew hot, dangerous gasses, ash, and rock that is powerfully blasted. The most common death from volcanic blasts is suffocation. Volcanic eruption can result in threats to health. They can also cause other disasters such as floods, mudslides, power outages, and wild fires.

As the youngest and most southeastern volcano on Hawaii 's big island, Kilauea has been suggested to be the world’s most active volcano; having recorded 61 historical eruptions, not including the continuous lava-lake activity in Halema 'uma 'u Crater (Life Stages of Hawaiian Volcanoes). Kilauea is at it 's shield-forming stage referencing volcanology. During this stage the excretion systems within the volcanoes are the most efficient at transporting magma to the surface since over 95% of lava gets erupted. As well as the constant eruption, the magma chamber of the volcano fully develops to serve as a station for older, less dense magma. The magma chamber migrates upwards as a volcano grows and the Kilauea volcano magma chamber

The largest eruption that ever happen was the Kulshan caldera. More than 50 km3 of rhyodacite magma exploded from a shallow magma storage region and filled the caldera and surrounding valleys with ignimbrite. That amount of material

The Kilauea Volcano is the youngest and most active Hawaiian shield volcano. This volcano is located on Hawaii’s Big Island. The volcano is part of the Hawaii Volcanoes National Park. Kilauea is 300,000 to 600,000 years old. The native people from the Polynesian Islands discovered Kilauea. The other four volcanoes of Hawaii are Kohala, Mauna Loa, and Mauna Kea.

A Volcano is a mountain or hill that has a crater running through it filled with lava, rocks, gas and hot vapour that will erupt. There are three types of volcanoes, there is the Cinder Cone volcano which is the smallest, the Shield volcano which is in most cases the biggest and the Composite volcano which can be the most deadly.

Mount Vesuvius is a well-known volcano located in the Gulf of Naples, Italy. It has a famous history of being very destructive to nearby civilizations, and erupting almost every century. The most notable eruption occurred in 79 AD, where the volcano eruption completely covered the nearby cities with ash and killed many people. Today, the area around surrounding the volcano is well populated; however, there are precautions put in place in order to avoid a loss as large as the one in 79 AD. Through the different effects it had on Naples, Italy, it is evident that the eruption of Mount Vesuvius in 79 AD has changed the face of volcanology.

How many volcanoes are going off right now? What are these volcanoes doing to the environment and to the people? So, how do volcanoes shape the earth? Volcanoes can be harming but, what most people don’t know is, they can be helpful too. One way they can be helpful is because they put off certain minerals in the ground that can help plants grow faster and better because, it enriches the soil over time. Another, instance in which they are helpful is because, they put so much nutrient in the soil they provide a safe haven for rare plants and animals after they have erupted and cooled. One, instance they can be harmful in though is because of how much of them may be going off at once. There are many ways that volcanoes help to shape the earth.

To begin, Volcanoes affect the environment in many ways. One way they affect the environment is, when the volcano erupts it produces rock and ash which later on make the surrounding soil very rich. According to the author of “Volcanic Soils” it states “Volcanic eruption produce deposits of rock and ash in the surrounding area. These deposits are rich in minerals…”

Volcanos have a big history in the world. They have caused havoc and caused beauty for thousands of years. 20 volcanos are erupting at this very moment! The author said “Some 1300 (and perhaps more than 1500) have erupted in the Holocene (the past 10,000 years).” (Simkin 58). This means that there have been 1500 eruptions that could have caused double that amount of deaths in the last 10,000 years. It might have caused marvelous sights as well.

This is only a general overview of the inner workings of volcanoes and their eruptions. For more infomation, visit Volcano World -- The Premier Source of Volcano Info on the Web.

How volcanoes affect people and environments? A volcano is a mountain or hill having a crater or vent through which lava, rock fragments, hot vapor, and gas are in. Volcanoes can change the weather. They can cause rain, thunder and lightning. Volcanoes can also have long-term effects on the climate, making the world cooler.