4.Mount St. Helens Has produced four major explosive eruptions since 1479, and dozens more smaller eruptions.Producing pyroclastic flows,lava flows, and lahars. During the past 4,000 years, Mount St. Helens has erupted more frequently than any other volcano in the Cascade Range. Volcanic mudflows filled rivers with rocks, sand, and mud, damaging 27 bridges. Over the course of 17 episodes, lava eruptions began filling the crater, building a lava dome that reached 876 feet above the crater floor.…
A volcano is a mountain with a vent at the top where magma and gasses…
Covering over 85% of Hawaii, Mauna Loa meaning long mountain, is the earth's largest volcano. Located on the main island of Hawaii, Mauna Loa pushes 12 million cubic meters of lava into Hawaii each day. It rises over 4 km above sea level. But, below the sea, it drops another 5km to the sea floor which is then indented another 8km under the weight of this giant land form. This means the total height of this volcano is a whooping 17km high from the base of the volcano to the crest. It is amid the earth's most currently active volcanos with its most recent eruption in 1984 being both extremely beautiful and destructive. It has been documented erupting 33 times between 1843 and 1984 at 5-6 year intervals and scientists currently expect an eruption…
The tallest volcano on Earth is Mauna Kea, one of the 5 volcanos that make up the Big Island of Hawaii. The summit of Mauna Kea is 4,205 meters above sea level, but its true height is much larger. When measured from the sea floor, Mauna kea is more than 9,000 meters tall, making it the tallest mountain on Earth.The tallest volcano on Earth is Mauna Kea, one of the 5 volcanos that make up the Big Island of Hawaii.…
Helens Eruption: Washington, May 1980.” Published in Popular Mechanics on July 31,2007. Writer (Galvin, John) discusses the weeks, days and hours leading up to the eruption of Mt St Helens and the aftermath of the devastation. It goes into details about the amount of loss to the forest, the devastation to the terrain, and survivor’s accounts of how they survived. Bruce Nelson, a survivor, discusses how he was steelhead fishing when the eruption took place. Nelson, explains the overall disbelief of the event and how his girlfriend and himself survived when they fell into a hole that had been created by a tree being uprooted. The article is more of a historical account of the events. However it provides detail information on what changes have taken place in monitoring volcanoes, the devastation of volcanoes and how technology is used today to observe volcanoes for better preparation techniques…
On May 18th, 1980, in Washington State, the volcano, Mount St. Helens erupted. This eruption caused widespread terror throughout the towns surrounding the mountain. The magma from the volcano burned up the forest and killed most of the animals in the area. It affected the wildlife greatly because, after the eruption, the ecosystem was burned and smoldered thus killing thousands of animals in the region. This eruption was the deadliest of all the volcanic activity in the United States, and the people who live near the mountain are still affected by what the eruption did to this day.…
What is the only active volcano in mainland Europe? That’s right Mount Vesuvius. Mount Vesuvius has had some of the largest volcanic eruptions. The most famous eruption was in 79 AD. This particular eruption destroyed Pompeii, Herculaneum, and many small cities. Although Vesuvius’ last eruption was in 1944 it is still considered active and a threat to the city Naples, the city it towers over.…
The United States is home to approximately 169 volcanoes (“How many”, n.d.). One well-known volcano in this country is Mauna Loa, also known as Long Mountain. It is the largest volcano in the world (“Pictures: America’s”, n.d.). The Pacific Ocean rests underneath the volcano (“Frequently Asked”, n.d.). Along with Kohala, Mauna Kea, Hualalai, and Kilauea, it forms Hawaii (“Mauna Loa Earth’s”, n.d.). The physical characteristics of Mauna Loa contribute to the ongoing examinations to monitor its impact to surrounding communities and environment.…
It is possible that large earthquakes can trigger local volcanoes to erupt. Stress changes caused by large earthquakes may either compress or expand nearby magma reservoirs. The compression could increase the reservoir pressure, while in the latter case; the expansion could cause tensile fractures around the reservoir. Either way, it increases the chance of eruptions following an earthquake. An example of possible triggering occurred after the 9.5 magnitude Chile earthquake on May 22, 1960. About 38 hours after the mainshock, Puyehue-Cordón Caulle in Central Chile erupted violently after being inactive for more than 25 years. In this instance it is likely that the fault rupture extended beneath the volcano. There is also clear evidence that large,…
The local effects of a super volcanic eruption would mainly be extremely high lava and ash deposits, this would affect around 100 miles around the volcano and would cause total destruction of everything in the area, and this would cause untold environmental, social and economic problems in the area, with the majority of people being killed in the eruption. The national effects of the eruption if it did take place within our lifetimes would destroy about 10,000 km squared of land, ash would fall 15 cm thick on every thing within 1000 km of the eruption, it is also predicted that it would kill 87,000 people, 1 in 3 people that were affected would die, again this…
An extinct volcano is a volcano that no one expects will ever have another eruption. One such volcano is also located on Hawaii’s Big Island and its name is Kohala. The last time that Kohala erupted was close to 60,000 years ago. As of now scientists do not believe that volcano will ever be active again.…
A volcano is a rupture on the crust of a planetary mass object, such as the Earth, which allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.…
A volcano erupts when magma escapes from inside the earth. As the magma is escaping from a confined space, a lot of energy is released with it, as happens with any other explosion. This is why many eruptions also produce huge quantities of gases and dust. Magma sometimes rises under enormous pressure, so it not only finds cracks in the earth’s crust, it can also create them. When magma reaches the earth’s surface it is called lava. An eruption is caused by lava escaping from below the earth's crust. This has many effects on the universe, explosive eruptions can change the surface areas around a volcano and disrupt drainage patterns, leading to long-term flooding. When volcanoes erupt they release a huge quantity of polluted clouds which make acid rain and acid rain can destroy small buildings, forests, and even living organisms. When lava and magma spreads they destroy nearly nine percent of the land surrounding including forests, houses, farms, and everything, and that effects the population of the area which will become zero!…
A volcano is an opening, or rupture, in the surface or crust of the Earth or a planetary mass object, which allows hot lava, volcanic ash and gases to escape from the magma chamber below the surface. The word volcano is derived from the name of Volcano, a volcanic island in the Aeolian Islands of Italy whose name in turn originates from Vulcan, the name of a god of fire in Roman mythology. The study of volcanoes is called volcanology.…
A volcano can be simply defined as a rupture or an opening on the crust of a planet like earth. This opening allows hot ash, molten rock and gases to blow off from the underground spaces. Volcanoes generally acquire shape of a mountain. Volcanoes are usually found at places where tectonic plates get converged or diverged. But there existence at a particular place depends upon many environmental and geological factors. Volcanoes can also occur at a place because of hot spots or mantle plumes. Even hotspot volcanoes are very common at other planets of solar system especially on moons and rock based planets.…