The Thermosphere is located between 80 and 400 km above the mesopause. It contains electrically charged particles known as ions. It is therefore known as Ionosphere. The temperature here starts increasing with heights. Radio waves transmitted from the earth are reflected back to the earth by this layer. The International Space Station and other satellites orbit in this layer. Auroras are observed in the lower parts of this layer.
Mount St. Helens is an active strato-volcano in Skamania County, Washington, in the Pacific Northwest region of the United States. It is well known for its ash explosions and pyroclastic flows.Mt. Vesuvius is a somma-stratovolcano located in Naples, Italy. It is universally acknowledged to be an extremely dangerous volcano.Mount Krakatoa is a Caldera in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung.
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