Mount Etna Eruption Information

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    Geography

    • Etna is the largest volcano in Europe.etna image by Jean-Marc Angelini from Fotolia.com

      Mount Etna, in Sicily, Italy, is the largest volcano in Europe. It stands at about 3,320 m and has an area of over 1,600 square km. However, Mount Etna is constantly changing. In the past 150 years alone, the mountain has shrunk by 52 m. The country of Italy also harbors massive volcanoes like Mount Vesuvius and the Campi Flegrei, but Mount Etna is a part of the Calabrian volcanic arc, not the Campanian, and is affected by the subduction of the African tectonic plate beneath the Eurasian plate. A quarter of Sicily's population lives on the slopes of Etna, flouting the dangers for the advantages of the rich volcanic soul and the tourism.

    Features

    • Etna has many craters and vents.etna 0481 image by Tanguy de Saint Cyr from Fotolia.com

      At the summit there are four craters: the Northeast Crater, Bocca Nuova Crater, Southeast Crater and Voragine Crater. There are also more than 260 smaller craters and vents along the flanks of the mountain that range from the size of a small hole to craters hundreds of meters across. Summit explosions create a lot of heat and fury, but it is these vent eruptions that are close enough to populated areas to threaten the inhabitants.

    Prehistoric Activity

    • Etna was born in the sea just off Sicily.etna 0002 image by Tanguy de Saint Cyr from Fotolia.com

      Like any mountain, volcanoes are constantly shifting due to the movement of tectonic plates, but they are also more volatile than mountains and may be subject to sudden and radical changes. Mount Etna began as an actively erupting, slightly sloping shield volcano just off the Sicilian coastline half a million years ago, and Etna's volcanic center moved to its present position around 170,000 years ago. Starting from about 35,000 years ago, a series of violent eruptions led to massive pyroclastic flows, which is the flow of hot gas and rock that can reach 700 km per hour, and helped to form a steeper stratovolcano. Around the end of this period, at about 15,000 years ago, the Ellittico Caldera (a crater made by the collapse of a volcanic cone) was formed. Ash from these explosions has been found in Rome.

    Ancient and Modern Activity

    • Etna's most violent explosion came in 1669 A.D.etna 0280 image by Tanguy de Saint Cyr from Fotolia.com

      An eruption in 396 B.C. kept the Carthaginians from reaching the town of Catania. The Aeneid, written between 29 and 19 B.C. by the Roman poet Virgil, describes an account of an Etna eruption. Between March 11 and July 15, 1669 A.D., the most violent recorded eruption occurred. 830 million cubic meters of lava destroyed a dozen villages and submerged part of Catania. The eruption was caused when a fissure that opened above the town of Nicolosi widened into a chasm that formed a double cone named Monti Rossi, more than 46 m high.

    20th Century Activity

    21st Century Activity

    • Activity continues into the 21st century.etna 0012 image by Tanguy de Saint Cyr from Fotolia.com

      Several more eruptions have continued into the 21st century. In 2001, seven fissures opened on the south and northeast slopes of the mountain. This occurred at the height of tourist season and received media attention because of the G8 summit in nearby Genoa. Between 2002-2003, an eruption caused the eastern flank to slip by 2 meters, damaging tourist stations and buildings around the Rifugio Sapienza area. Ash could be seen from space and ended up 600 km away in Libya. Eruptions in 2008 and 2009 spewed lava into the Valle del Bove and caused massive ground deformations from earthquakes.

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