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A volcano is a break in the earth's crust, where incandescent materials such as lava and gases come out. But there are also solid materials such as: Pumices, Lapilli an Volcanic bombs.
In the volcanoes the melted rock is called magma.

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The Yellowstone is located in Yellowstone Natonal Park in the United States. The Yellowstone volcano has made 142 eruptions since it has been active. Yellowstone is a supervolcano made up of a series of overlapping volcain caldera. Yellowstone volcano erupts every 600.000 years in fact the last time it erupted was 600.000 years ago.

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WHAT HAPPENS IF YELLOWSTONE SUPERVOLCANO ERUPTS?

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WHAT HAPPENS IF YELLOWSTONE SUPERVOLCANO ERUPTS?

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If the supervolcano explloded, a cloud of ash would obscure the sky with a diameter of at least 800 kilometers and falling back would destroy crops and pollute river water.

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https://learningapps.org/watch?v=ph6o1qugt23

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An earthquakes is a vibration on the Earth's surface. The hipocentre is where vibration called seismic waves begin deep down inside the Earth. The point at which it reaches the surface is called the epicentre and shock waves spread out from there.

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2 disastrous earthquakes occurred in  Acquila before 2009 with a periodicity of 300 years.

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The name of the 2009 Aquila eartkquake refers to a series of seismic events. The name refers to the shock that occured on 6 april 2009 at 3.32 a.m. and had a magnitude of 6,3. It was generated by the activation of a normal fault called the Paganica fault as the surface evidence of this tectonic structure crossed the town of Paganica. The earthquake has a Magnitude of 5.8 with Richter and epicenter about ten kilometers a southwest from Aquila hypocentre equal to 8.8.
km. The final toll is 309 victims, 1600 wounded and with a cost of 10 bilion euros.

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https://learningapps.org/watch?v=puivrmjwj23