Mount VesuvIus

Mount Vesuvius is located in the province of Naples, Italy.Vesuvius is 4,203ft or 1,281 metres.By the 1st century, Pompeii was only of a number of towns located around the base of mount Vesuvius.The area had a substantial population which grew prosperous from the region's renowned agricultural fertility.Many of Pompeii's neighboring communities, most famously Herculaneum,also suffered damage or destruction during the AD 79 eruption.The 79 eruption which is though to have lasted about 19 hours,released about 1 cubic mile or 1 cubic kilometres of ash and rock over a wide area to the south and south-east of the crater, with about 3m or 10 ft of tephra falling on Pompeii.The white ash produced by this eruption is mainly of leucite and phonolite.The AD 79 eruption was preceded by a powerful earthquake seventeen years beforehand on 5 February, 62,which caused widespread destruction around the Bay of Naples, and particularly to Pompeii.

Mount Etna

Mount Etna is located in Sicily Italy.Etna is about 500,000 years old.Etna is 3,328 metres high or 10,919 ft.Volcanic activity at Etna began about half a million years ago,with eruptions occurring beneath the sea off the coastline of Sicily.300,000 years ago, volcanism began occurring to the southwest of the present-day summit,before activity moved towards the present center 170,000 years ago.Eruptions at this time built up the first major volcanic edifice,forming a strato-volcano in alternating explosive and effusive eruptions.The growth of the mountain was occasionally interrupted by major eruptions leading to the collapse of the summit to form calderas.

Tambora

Tambora's location is the Lesser Sonda Islands in Indonesia.The elevation is 8,930 ft or 2,722 metres.All vegetation on the island was destroyed.After Tambora erupted Uprooted trees, mixed with pumice ash, washed into the sea and formed rafts of up to 5 kilometres across. One pumice raft was found in the Indian Ocean, near Calcutta on 1 and 3 October 1815. Clouds of thick ash still covered the summit on 23 April. Explosions ceased on 15 July, although smoke emissions were still observed as late as 23 August. Flames and rumbling aftershocks were reported in August 1819, four years after the event.

Mount Laki

Mount Laki is located in Iceland.The elevation for this mountain is 5,659 ft or 1,725 metres.On June 8th 1783 , a fissure with 130craters opened with phreatomagmatic explosions because of the groundwater interacting with the rising basalt magma. These are sometimes mistaken by non-volcanologists as being "Plinian" but are not. Over a few days the eruptions became less explosive, strombolian, and later Hawaiian in character, with high rates of lava effusion. This event is rated as V.E.I. 6 on the Volcainc Explosivity Index, but the eight month emission of sulfuric aerosols resulted in one of the most important climatic and socially repercussive events of the last millennium.

Unzen Dake

Mount Unzen Dake is located in Kyushu Japan. The last time Unzen erupted was 1996. Unzen is 1,500 metres high or 4,921 ft.The U.S.D.P is the Unzen Scientific Drilling Project.In 1999, an ambitious project began at Mount Unzen to drill deep inside the volcano and sample magma in the 1990–1995 eruption conduit. The project hoped to shed light on some fundamental questions in volcanology, such as why magma repeatedly travels in the same conduits despite the solidification of magma in them at the end of each eruption, and how it can lose enough gas on its ascent to erupt effusively rather than explosively.

Nevado del Ruiz

Nevado del Ruiz is in Colombia, South America. The elevation of Nevado del Ruiz is 5,300 meters or 17,388 ft. The range of this volcano is in Cordillers Central.The summit of Nevado del Ruiz is covered by glaciers (nevado means "snow covered" in Spanish), which formed over many thousands of years, and have generally retreated since the last glacial maximum. From 28,000 to 21,000 years ago, glaciers occupied about 1,500 square kilometers of the Ruiz–Tolima massif. As late as 12,000 years ago, when the ice sheets from the last glacial period were retreating, they still covered 800 square kilometers. During the Little Ice Age, which lasted from about 1600 to 1900 CE, the ice cap covered approximately 100 square kilometers.