Table of Contents
- 1 How do Icelandic volcano eruptions differ from Hawaiian eruptions?
- 2 How does the difference in lava composition between the Hawaiian volcanoes and Mount St Helens explain the difference in the shape of the two types of volcanoes?
- 3 Why are volcanic eruptions in Hawaii less explosive compared to other volcanic eruptions?
- 4 Why do volcanoes erupt in Hawaii?
- 5 Why is Hawaii volcanic?
- 6 What type of volcanoes does Iceland have?
- 7 Was Iceland formed by a volcano?
- 8 Is the La Soufriere volcano erupting?
How do Icelandic volcano eruptions differ from Hawaiian eruptions?
In Hawaii, there are 6 active volcanos while Iceland has 30. The famous Kīlauea in Hawaii is known for more prolonged eruptions than the volcanos in Iceland. In Iceland, there is more variety of eruptions, and they are usually more explosive and powerful.
How does the difference in lava composition between the Hawaiian volcanoes and Mount St Helens explain the difference in the shape of the two types of volcanoes?
The fluid (low viscosity) basalt lava at Hawaii can flow for long distances, resulting in a much wider volcano than Mt St Helens, which has very viscous lava that is highly resistant to flow.
How are the volcanoes on the Hawaiian Islands different from other volcanoes?
The Hawaiian Islands were literally created from lots of volcanoes—they’re a trail of volcanic eruptions. Hot-spot volcanism can occur in the middle of tectonic plates. That’s unlike traditional volcanism, which takes place at plate boundaries.
What is the difference between the volcanism of Mt Kilauea volcano in Hawaii and Mt St Helen’s volcano in Washington state?
The two volcanoes are also different shapes: Kilauea is a gently sloping shield volcano, unlike Mount St. Helens, which is a steep-sided stratovolcano, also known as a composite volcano. This allows for different types of eruptions, with shield volcanoes being much less violent.
Why are volcanic eruptions in Hawaii less explosive compared to other volcanic eruptions?
Typical activity: “nonexplosive” or weakly explosive Hawaiian eruptions are typically gentle because their lava is highly fluid and thus tends to flow freely both beneath the surface and upon eruption. Highly fluid lava favors the nonviolent release of the expanding volcanic gases that drive eruptions.
Why do volcanoes erupt in Hawaii?
The key factors in generating a Hawaiian eruption are basaltic magma and a low percentage of dissolved water (less than one percent). The lower the water content, the more peaceful is the resulting flow. Almost all lava that comes from Hawaiian volcanoes is basalt in composition.
How does the composition and viscosity of lava flows differ between composite volcanoes and shield volcanoes?
How does the composition and viscosity of lava flows differ between composite volcanoes and shield volcanoes? Composite volcanoes tend to have intermediate to felsic lava that is very viscous whereas shield volcanoes have basaltic lava that is low in viscosity.
What are the similarities and differences of volcanoes and mountains?
Mountains and Volcanoes are somewhat similar but the major factor that makes them different is their formation. A mountain is formed due to various geological processes like movement and opposition of tectonic plates but a volcano is formed around a vent that allows magma to reach the surface of the earth.
Why is Hawaii volcanic?
The Hawaiian Islands are volcanic in origin. As the plate moves over a fixed spot deeper in the Earth where magma (molten lava) forms, a new volcano can punch through this plate and create an island. The Hawaiian Islands are believed to be formed from one such ‘hot spot’.
What type of volcanoes does Iceland have?
What type of volcano is found in Iceland? The most common volcanoes in Iceland are composite or stratovolcanoes which stretch out in a line, often across large areas. Shield volcanoes, which are shaped like a warrior´s shield set down on the ground, are also common.
How do continental volcanoes differ from oceanic volcanoes?
oceanic arcs form when oceanic crust subducts beneath other oceanic crust on an adjacent plate, creating a volcanic island arc. (Not all island arcs are volcanic island arcs.) continental arcs form when oceanic crust subducts beneath continental crust on an adjacent plate, creating an arc-shaped mountain belt.
What’s the difference between volcano and mountain?
A mountain is formed due to various geological processes like movement and opposition of tectonic plates but a volcano is formed around a vent that allows magma to reach the surface of the earth. It all has to do with plate tectonics.
Was Iceland formed by a volcano?
Iceland, like the islands of Hawaii, was formed by volcanoes. In 1783, Laki (L) killed half the livestock and a quarter of the population, and in 934 Edlgja might well have had the largest basalt flow in the history of Planet Earth.
Is the La Soufriere volcano erupting?
At 8:41 am this morning 9-4-21 an explosive eruption began at La Soufrière volcano in St. Vincent. This is a culmination of the seismic activity that began on April 8. The eruption is ongoing and more information will be shared as things progress. #lasoufriere #uwi #volcano #svg pic.twitter.com/C2zWrjPcpP
What type of plate boundary are the Hawaiian Islands?
The Hawaiian Islands, which are located on the middle of the Pacific plate, formed as the plate moved over this hotspot. Mauna Kea is a dormant volcano. Kīlauea, another volcano on the island of Hawai‘i, is currently active. It is one of the longest continuously erupting volcanoes and usually produces a slow, gentle flow of lava.
What was the name of the volcano that erupted in 1983?
On January 3, 1983 I was golfing at the Volcano Golf and Country Club on the Big Island of Hawaii, when, on our back nine, the ground shook and we saw fountains of lava. It was a Kilauea Volcano eruption that continues until today, 27 years later.
https://www.youtube.com/watch?v=OniJpS9SuWc