Within a week several eruptions blasted clouds of ash into the atmosphere and soon after a new lava dome emerged in the crater. Why do some volcanoes ooze lava while others shoot rocks gases and ash high into the air.
Volcanic eruptions may be rather quiet and slow paced or they may be dramatically violent and catastrophic.
Why do volcano erupt. Helens in washington state which erupted on. Volcanoes erupt when molten rock called magma rises to the surface. Without said catalyst the molten rock will continuously form up until such time as the tectonic plate shifts against cutting off the flow of magma from the earths mantle.
Volcano monitors had picked up the occurrence of hundreds of small earthquakes and other signals that the volcanos crater floor had begun to rise. What can happen is. It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it.
One example of an active volcano is mount st. To understand how and why volcanoes erupt we must first understand the different layers of our planet. The lower density of the magma relative to the surrounding rocks causes it to rise like air bubbles in syrup.
There are three main types of volcano. It all depends on how many bubbles form in the magma. Mount pinatubo experienced a change of pressure and a big eruption was inevitable.
When a volcano erupts the magma becomes lava and shoots into the air eventually running down the side of the volcano. Volcano eruptions happen when magma erupts from beneath the earths crust. Magma is formed when the earths mantle melts.
This is most likely to occur in climes of the world where sudden ocean temperature changes can occur such as near the equator. Active volcanoes are aptly named because they have recently erupted and could very likely erupt again. As a consequence the air column above the volcano was swept into the typhoons path.
While many people envision a conical peak when they think of a volcano a wide variety of landforms fall into the category including midocean ridges and the fissures that erupt great sheets of flood basalts. A shield volcano has a flat dome like appearance and releases basaltic lava in a gentle manner that is often slow and easy for humans to outrun. If a lot of bubbles form as the magma rises to.
Either way theyre a testament to the surging unrest of the inner earth. For a volcano to erupt there must be a catalyst to instigate the occurrence. Magma is formed when the earths mantle melts.
Volcanoes erupt because of density and pressure.
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