Presentation on theme: "Hawaii- A volcanic Hot Spot where weakness in the earths crust lets lava up to the surface. Hawaii has approx. 107 volcanoes altogether, active or not."— Presentation transcript:
Hawaii- A volcanic Hot Spot where weakness in the earths crust lets lava up to the surface. Hawaii has approx. 107 volcanoes altogether, active or not. Location- where is Hawaii? Hawaii and its islands are located in the centre of the pacific ocean, 20* north of the equator.
How was Hawaii made? All of the Islands of Hawaii have been made by volcanic eruptions of basalt rock. What is a hot spot? A hot spot is a weakness in the earths crust that forces lava up to the surface. What and where is Kilauea? Kilauea is in the south of Hawaii's main island. It is a huge volcano that is very active, that started erupting in 1983.It is not dangerous, unless you get in the way of its lava flow. The Kilauea eruption The eruption started on the 3 rd January 1983, that produces basalt. When it first came, no- one was worried, but it burnt down many houses, at a top speed of 40kph, and the volcano produces enough lava to go round the world 50 times. It is so hot it can burn tarmac and set wooden houses on fire.
How have people been affected by the eruption of Kilauea since 1983? When the eruption occurred, It was unexpected, so naturally people did not panic. But when the lava reached their house, they fled, and watched their house burn to the ground. The lava reached kalapana gardens, which is now under more than 20m of rock. The locals now consider this normal. When the lava reaches their house they run, there is no way to stop it! How does the U.S geological service monitor Kilauea? The experts do it by taking samples of rock, from an opening in the lava crust, where they can see the lava flow. They take a piece of metal attached to string and throw it in the lava and out again, giving you a great lump of basalt rock, which they study to find out what the volcano is going to do next, saving hundreds of lives. Conclusion It is unusual for Hawaii to have volcanoes because it was made from multiple volcanoes. There are two types of volcanoes, active, and non active. The volcanoes there are not too dangerous because everyone knows where the lava flow is heading, and the do not explode, they only run lava in a stream.