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2021-05-16

What conditions make violent volcanic eruptions?

What conditions make violent volcanic eruptions?

1 Answer. Relatively thick magma containing significantly high levels of gas cause violent volcanic eruptions. Thick magma (viscous magma) doesn’t flow easily. What makes a magma viscous is high silica content.

What three factors of magma determine how violent an eruption will be?

The primary factors that determine the nature of volcanic eruptions include the magma’s temperature, its composition, and the amount of dissolved gases it contains. As lava cools, it begins to congeal, and as viscosity increases, its mobility decreases. The viscosity of magma is directly related to its silica content.

What special condition are required to make magma?

Magma can also be created when hot, liquid rock intrudes into Earth’s cold crust. As the liquid rock solidifies, it loses its heat to the surrounding crust. Much like hot fudge being poured over cold ice cream, this transfer of heat is able to melt the surrounding rock (the “ice cream”) into magma.

What magma composition causes the most violent volcanic eruptions?

Explosive eruptions are favored by high gas content & high viscosity magmas (andesitic to rhyolitic magmas). The explosive bursting of bubbles fragments the magma into clots of liquid that cool as they fall through the air.

Which type of magma is the most explosive?

andesitic

At what point does magma become lava?

When magma reaches the surface and erupts from a volcano, it officially becomes lava.

What is the hottest volcano in the world?

Pūhāhonu

What is the temperature of lava in a volcano?

Lavas range in temperature from about 800 °C (1,470 °F) to 1,200 °C (2,190 °F). This is similar to the hottest temperatures achievable with a forced air charcoal forge. A lava is most fluid when first erupted, becoming much more viscous as its temperature drops.

Is there anything hotter than Sun?

Scientists have produced superheated gas exceeding temperatures of 2 billion degrees Kelvin, or 3.6 billion degrees Fahrenheit. This is hotter than the interior of our Sun, which is about 15 million degrees Kelvin, and also hotter than any previous temperature ever achieved on Earth, they say.