Kilauea and Mt St Helens Comparison Essay

803 Words Oct 17th, 2012 4 Pages
Geography study on the differences
Between the volcanoes MT st Helens and Kilauea

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.

There are many differences between the volcanoes for example the explosivity of the two volcanoes most recent eruptions are completely different Kilauea is almost constantly flowing and has virtually no explosions at all it also has low viscosity lava flows running from it constantly where as MT st Helens is completely different in MT st Helens most devastating eruption in 1980
There was a huge explosion
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The product produced by the different volcanoes are completely different MT st Helens volcanic products are pyroclastic flows, the destruction of trees are gasses. Kilauea how ever instead of producing pyroclastic surge Kilauea produces land when the molten lava hit the water (fig 1) and hardens it also produces land slides which can produce tsunamis when they hit the water which is completely different than MT st Helens.

The volcano types are also different with Kilauea being an example of a shield volcano. Shield volcanoes form under the ocean and are made of pillow basalt it is place in one of earths shield volcano hotspots where hot mantle rise from the boundary between the core and lower mantle to the crusts surface volcanoes in the hot spot will erupt without the help of plate tectonics. Mt st Helens on the other hand is an example of a volcano that involves conversion plate tectonics they are usually found when one plate ducks down below another oceanic plates dive under the lighter continental plates (fig 3) melting the plate in the magma causing gasses and hot molten rock to form are rise up through the earths crust and erupt though the surface.

How ever there are some similarities between the two volcanoes for example they are both highly predictable. Kilauea is almost constantly erupting so is very predictable and is always prepared for by authorities and MT Helens is also easy to

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