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Environmental impact of volcanoes
Short note on volcano
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1. Despite being in a dangerous location, the slopes of volcanoes can be attractive to people setting up homes due to the rich, fertile soil
2. According to scientists, in the last 500 years approximately 20,000 people have died as a result of volcanic eruptions
3. A volcano is landform (generally a mountain) where, during an eruption, ash, gas and molten rock (magma) escape through the Earths surface
4. Approximately 1 in 10 people in the world live within danger range of an active volcano
5. Located on the planet Mars, Olympus Mons is the largest volcano (and mountain) in the Solar System. It is 17 miles (27km) tall and more than 320 miles (520km) wide
6. The word volcano originally comes from the name of Vulcan, the Roman god of
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For months after an eruption, dark skies, heavy rains and severe winds can be prominent
90. Geysers rely on volcanic heat to warm the trapped ground water, which they then expel in to the air
91. Only 20-30 volcanoes erupt each year
92. The Hawaiian goddess of fire and volcanoes, Pele, was said to have had a terrible temper, and would throw lava at anyone that angered her. It was said thought that she lived in the crater of Kilauea volcano
93. Stratovolcanoes are the most common type of volcanoes. Mount Fuji, Japan and Mount Rainer in Washington state are examples of stratovolcanoes
94. Approximately 20% of all existing volcanoes are located underwater
95. Black beaches, such as those in Hawaii and Iceland has sand that is made from basalt; formed when lava cools is broken in to sand particles
96. Geothermal energy uses heat energy from magma to run power plants and warm water in some volcanic areas
97. 10% of the worlds active volcanoes are located in Japan
98. The newest land mass on earth, Sutsey Island, was created in 1963 from an undersea volcano
99. In Japan, it is believed that illnesses can be cured by bathing in warm volcanic sand
100. In 1865, ‘magma’ was first used geologically to describe molten
The last eruption of this massive volcano occurred more than 115 years ago in 1884. The eruptions of Mount Rainier produce lahar mudflows which are similar to pyroclastic flows except they contain more water. These mudflows carry debris of volcanic ash and boulders that produce lava flows and have the consistency of concrete flowing down a mountain (C.M. Riley. Lahars can flow up to 100 kilometers per hour and can extend to more than 300 kilometers in distance. Because they are hard to predict, give off little warning signs, and move so rapidly through valleys, lahar slides are considered to be one of the most deadly volcanic hazards.
Mauna Loa is located on a hot spot in the Pacific Ocean. It is not near a plate boundary, in fact it is 3,200 km from the nearest plate boundary, and is situated in the middle of the Pacific tectonic plate. This is actually a rarity, as 90% of volcanoes are along a tectonic plate boundary. A hot spot occurs where long, stationary vertical pools of magma rise up and towards the plate. Movement of the tectonic plates above the hot spot created Mauna Loa, along with the other Hawaiian volcanoes. The older Hawaiian Islands were once above this stationary hot spot, but have been carried northwest by the slowly moving Pacific plate. As the plate moves, it carries the previously formed, older, volcanoes with it, creating a trail of younger, new volcanoes behind. The islands are lined up along the Hawaiian Ridge-Emperor Seamounts chain, which is 3,750 miles and includes Kauai, Maui, Oahu and Hawai’i, from north to south, respectively. There are around 80 volcanoes in this chain; most of them underwater, consequently the term seamount refer to submarine volcanoes. Three volcanoes of Hawai’i, Mauna Loa, Kilauea and Loihi seamount, are all currently sharing the Hawaiian hot spot. Although, recent evidence has shown that all three volcanoes use have separate plumbing systems to expel the lava from the pool of magma deep below them. It has also been suggested that Loihi is slowly moving Mauna Loa from the center of the island, thus shifting directly over the hot spot. The closer to the hot spot a volcano is, the more active it will be. The Hawaiian hot spot has laid down layers of lava, building up enormous islands from the ocean floor.
Six Hawaii Island volcanoes coalesced, or joined, to form the Big Island: Mahukona Volcano, Kohala Volcano, Mauna Kea Volcano, Mauna Loa Volcano, Hualalai Volcano and Kilauea. While Kilauea may be the most famous of the Hawaii Island volcanoes, Mauna Loa and Hualalai are also active volcanoes. To be considered active, a volcano will have erupted at least once in the last 10,000 years, and there continues to be sufficient seismic activity below the surface to suggest that another eruption may occur in the next 1000 years or less. Kohala was devastated by a massive landslide between 250,000 and 300,000 years ago. The Hawaiian
Lightning has been known to strike the summit of the volcano frequently during summer thunderstorms.
Volcanoes. The naturally forming landforms that can look remarkably beautiful. Gentle slopes, or high rising heights with snow caps and greenery that seems to attract many tourists and sightseers around the world. These magnificent landforms can also cause major destruction and can produce forces that can explode, burn, and create a great deal of damage. Two of these extravagant wonders of the world is the Mount Saint Helens composite volcano in Washington, US, and the Mauna Loa shield volcano in Hawaii, US. These landforms have a eruption history of many colors. One has a great power in eruption, but another has a eruption that is quiet and gentle. In comparing these two volcanoes there are many likes, and dislikes, to consider. So the following
Stories about volcanoes are captivating. Myths come in different versions, but all of them are capable of capturing yours, and everybody’s imagination.
Volcanoes can be very deadly but the location can also determine that. Zones are what tells people how dangerous they are. In document c it explains each zone. There are five zones by one being the harshest zone and five being the safe zone. People live in all zones and that's not good at all. Documents C says " There is an area around an active event where likelihood to be killed is extremely high." Volcanoes are always capable of surprises and never up to something good.
With the lava flowing at a rate of 800 to 1,300 gallons per second from vents on the east side zone of Kilauea, more than 500 acres of new land have been added to the island since 1938. The eruption of Kilauea still continues to flow at two places in the park. The vent within Halema'uma'u Crater and the Pu'u 'Ō'ō vent.
The Mauna Loa volcano is located in Hawaii and means "Long Mountain" in Hawaiian. It is a giant, basaltic shield volcano. It is one of the largest volcanoes and mountains in the world and has been called the "monarch of mountains". It has an estimated volume of 9,600 cubic miles and takes up half the land of Hawaii. It extends about 120 km starting from the southern tip of the island to the northern region. It is 97 km (60 miles) long, 48 km (30 miles) wide, and is 8,742 km (28,680 miles) high from the base on the sea floor to the top. The slopes are steeper than 12 degrees and about 4 degrees at the top of the volcano. Mauna Loa formed about half a million years ago and in the middle stages of forming into a shield volcano where lava flows to form a sloped and broad flat domed volcanic cone. Along with Mauna Kea, the Mauna Loa volcano is responsible for the creation of the Hawaiian Islands. Mauna Loa has erupted thirty-three times since 1843 and is known as one of the most active volcanoes in the world today. The last eruption was 1984 and lava flowed within 4 miles of the city of Hilo. This shows that it is dangerous to live anywhere near Mauna Loa and that it poses as a threat to anyone living near it because it has a very high possibility of erupting within a very short span of time. Below is a picture of Mauna Loa taken from a bird's eye view.
Within a thousand kilometres falling ash, lava flows and the utter explosive force of the eruption would kill practically all life. Volcanic ash would cover places as far away as Iowa and the
One thing that is frowned upon is removing volcanic rocks from the area. People that have removed pieces of the rocks have been said to experience adverse events when they returned home. They attributed it to them taking the rock with them.
Volcanoes can be one of the most destructive forces on Earth. It is estimated that some
For the generation of electricity, hot water, at temperatures ranging from about 700 degrees F, is brought from the underground reservoir to the surface through production wells, and is flashed to steam in special vessels by release of pressure. The steam is separated from the liquid and fed to a turbine engine, which turns a generator. In turn, the generator produces electricity. Spent geothermal fluid is injected back into peripheral parts of the reservoir to help maintain reservoir pressure. If the reservoir is to be used for direct-heat application, the geothermal water is usually fed to a heat exchanger before being injected back into the earth. Heated domestic water from the output side of the heat exchanger is used for home heating, greenhouse heating, vegetable drying and a wide variety of other uses.
Many volcanoes are magnificent so they are major tourist attractions which creates incomes. The island of Krakatoa is surrounded by many beautiful islands incuding Sumatra and java. tourist get drawn to the tropical terrain which provides snorkelling and sightseeing. Many surfers come to these small distant islands as they are famous for their consistent waves. Also the chemicals in the ash of the Krakatoa volcano was useful as its nutrience was very beneficial to the soil. Eruptions also create new landscapes that attract people. Volcanoes also generate rare minerals which can sometimes be very valuable such as diamonds and gold, nearby people who find them have the opportunity to sell them to museams and make a fair amount of