Kilauea is a volcano in the Hawaiian Islands it is one of the five shield volcanoes in the Hawaiian language Kilauea means spewing or spreading. Mt St. Helens is an active stratovolcano in Washington it is named after British diplomat lord st Helens.…
Let’s begin with Mount St. Helens which is located in the pacific northwest of the United States. To be more specific it is located in Washington State and is a part of the Cascade mountain range that spans from California to Canada. It is a composite volcano, which has steep sides that are formed by alternating layers of lava flow, and pyroclastic material made up of ash and other debris. These types of volcanoes have a tendency to have very explosive eruptions and pose a great many problems for people and animals nearby1. This is in contrast to the volcanoes found in Hawaii which have slow flowing lava eruptions and few if any massive explosions. Mount St. Helens is formed by a subduction zone where the Juan de Fuca Plate plunges beneath the North American Plate causing the uplifting of the Cascade Mountains. The last eruption took place on May 18, 1980 and had such a force that was compared to 500 Hiroshima atomic bombs going off at once2. Once the explosion went off, it lead to a blast that generated a 2.8km3 mud flow that moved 22 miles at a speed of 157 miles per hour. Many studies have been done that show there is a large rotating block under it which causes friction that was likely the cause of the eruption2. When Mount St. Helens exploded when a 5.1 magnitude earthquake went off one mile below the volcano causing the bulge that had been building for months after the collapse of the summit, to suddenly collapse on the north flank. The mudflow and lava that would follow would kill many animals and 57 people. They do not know when it will erupt…
The voyagers have arrived at Loihi Seamount, a 9,000 foot (2,700m) volcano 21 miles (34 km) off the Big Island. The volcano, which started forming only a few hundred thousand years ago, is growing slowly up toward the surface of the sea. In perhaps another 60,000 years, it will emerge from the waves, taking its place beside the other 125 volcanic islands in the Hawaiian-Emperor island chain. The growth of this volcano is giving scientists an opportunity to witness an Earth drama never before seen: the birth of a Hawaiian island.…
Kohala is the oldest of five volcanoes that make up the island of Hawaii.[3] Kohala is an estimated one million years old—so old that it experienced, and recorded, a reversal of magnetic field 780,000 years ago. And it have last erupted 120,000 years…
At a hotspot, the underlying mantle is hotter than average causing ‘mantle plumes’ to rise to the bottom of the lithosphere, find a thin or weak part of the lithosphere, and breaks through. In the case of the Hawaiian islands, the hotspot is underneath an oceanic plate and the lava has built up until it is higher than the surface of the sea. These hotspots remain in the same place in relation to the mantle, but the plates move across the hotspots. The Pacific plate has moved across a hotspot in the ocean leaving the chain of Hawaiian Islands which have been formed at different times over millions of years. By dating the rocks which make up the Hawaiian Islands, it is clear that the tectonic plate must be moving in relation to the hotspot- a key piece of volcanic evidence.…
Mauna Kea is part of the network of volcanos above the Hawaiian hotspot. The tectonic plate that has the Hawaiian islands is slowly moving above the hotspot, and it recently carried Mauna Kea away from the hotspot. Scientists believe that Mauna Kea is now dormant; it last erupted about 4,500 years ago. Although, researchers do think it’s going to erupt again, the time between eruptions is measured in hundreds of years. The most active volcano on the island, Kilauea, erupts every few years.…
As the Hawaiian Islands are volcanic Islands, many volcanoes are still on the islands, some being dormant and some still active. The Big Island of Hawaii is made up of 5 volcanoes; Kohala, Mauna Kea, Hualalai, Mauna Loa, and Kilauea. Kilauea is the most active volcano in the world as well as the most visited with the latest…
A volcano is an earth hazard that occurs on faults between tectonic plates on a destructive boundary and an eruption is a natural disaster. A primary impact happens immediately after the disaster and before any response like death or collapsing or destruction of buildings. A secondary impact occurs later after the disaster, such less farm produce or a reduction in tourism. The severity of these impacts will differ considerably in a MEDC and LEDC where volcanic eruptions have taken place. These may be seen in the Mount St. Helen volcano eruption as well as in the Iceland volcanic eruption. They may also show that the impacts vary from volcano to volcano, place to place.…
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…
As www.marinebio.net states, Wailea-Makena, Hawaii, East Maui County was caused by a hotspot or an extra hot plume of molten rock. This happens when heat rises as a thermal cloud from inside of the Earth. Heat and pressure at the bottom of the tectonic plate forces magma to form which then rises through cracks and erupts to form volcanoes. As volcanoes move away from a hotspot, they start to erode and become inactive. Maui is the third oldest volcano of the main Hawaiian islands and could still erupt one more time. Haleakalā or the East Maui Volcano is also a shield volcano or a broad, domed volcano with sloping sides. It forms more than 75% of the Hawaiian Island of Maui and has an alert level of “normal.” The last time Maui erupted was in the 17th century, but even so, the soil is still very fertile from it’s past eruptions. Thanks to this fertile soil, crops such as coffee, macadamia, papaya, tropical flowers, sugar and fresh pineapple grow here.…
The most recent eruptive period was in the 1980’s. Due to USGS (United States Geological Survey) geologists observations of a large bulge measuring 140m on the north face of the volcano. Using modern laser and radar technology they were able to track the movements of this bulge in order to predict when the volcano was in danger of erupting from a an observation tower 6 miles away. With this data collected the authorities were convinced to shut off the volcano to the local populations who make use of the volcano’s fertile soil for a large logging business and many recreational users who walk dogs or come to enjoy the views. As will be shown later, the shutting of the volcano saved many local thousands of tourists, workers and locals lives alone.…
Scientists have created a map that divides the five volcanoes in the Hawaiian Island into zones that are ranked based on the possibility of the lava flowing through these zones.…
Living near Hawaii’s volcano, Kilauea, is not worth the risk because of the uncertainty of the volcano erupting once again. In the article, “A force of nature,” there are many dangers that can occur. The gasses emitted from the volcano is toxic, these toxic gasses could affect people’s health in major ways. One way that people’s health can get affected by the volcano is, when the gases are released into the air, the gases in the air can be inhaled. These gases can harm a human body in major ways. To a point where people can get very ill or possibly die because of amount of toxic gases inhaled. Another reason why living near Hawaii’s volcano isn’t worth the risk is because, gravel-sized rocks can be discharged into the air and come hurdling…
Since Mauna Loa is part of Hawaii, it is formed by a hot spot (“Hawaii: Geology”, n.d.). The Pacific Plate, known as a hot spot, is present in Kilauea, Loihi seamount, and Mauna Loa. The plate enabled the formation of Mauna Loa, thus produces consecutive eruptions. Although eruptions can be hazardous, the ones in Hawaii are considerably not destructive (“Hawaii: Geology”, n.d.). Mauna Loa and the near Kiluaea (“Hawaii: Geology”, n.d.) are the only relatively active volcanoes in Hawaii. One of the first eruptions of Mauna Loa occurred about 700,000 to 1,000,000 years ago (“Mauna Loa Earth’s”, n.d.). It is estimated every six years the Mauna Loa erupts lava flows (“Frequently Asked”, n.d.) An initial documented account of an eruption was in 1780 (“Eruption History”, n.d.). The volcano has reportedly erupted thirty-three times since 1843, making it one of the most active volcanoes on the…
The two active volcanoes are Kilauea and Mauna Loa. The 4,000 foot high Kilauea is the one everyone wants to see. The Kilauea Visitor Center will supply you with current information on trails and where you might see lava flow. Plan to spend the better part of the day here because you're looking at a 3 hour hike or an 11 mile drive along Crater Rim Drive. The scenery is breathtaking as you pass by the Kilauea caldera and through a lush tropical rain forest. This is one place you'll be talking about for years even if you didn't see the lava flowing while you were…