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Teide (Mount Teide or Pico de Teide) is a volcano and mountain on Tenerife, Canary Islands (28.27 N, 16.6 W). At 3717 m above sea level and approximately 7000m above the adjacent sea bed, it is the highest mountain in Spain, and the third largest volcano on Earth. It is currently dormant, having last erupted in 1909Events January 5 Colombia recognizes the independence of Panama. January 16 Ernest Shackleton's expedition finds the magnetic South Pole. January 28 United States troops leave Cuba after being there since the Spanish-American War. February 12 The National from the subsidiary vent of Chinyero on the west slope of Teide. Other significant eruptions occurred in 1704Events Building of the Student's Monument in Aiud, Romania. February 29 Native Americans sack Deerfield, Massachusetts August 13 War of the Spanish Succession: Battle of Blenheim Births June 22 John Taylor English Classical Scholar (died 1766) Deaths Febr- 1706Events May 23 Battle of Ramillies November 5 Dublin Gazette first edition Births January 17 Benjamin Franklin, American politician (died 1790) January 28 John Baskerville, printer, typefounder (died 1775) March 6 Sir George Pocock, British admiral (died 1 and 1798Events February- October Irish Rebellion of 1798 April 7 The Mississippi Territory is organized from territory ceded by Georgia and South Carolina and is later twice expanded to include disputed territory claimed by both the U. and Spain April 26 France a. The summit has a number of small active fumaroleA fumarole ( Latin fumus smoke) is an opening in Earth's (or any other astronomical body's) crust, often in the neighborhood of volcanoes, which emit steam and gases such as carbon dioxide, hydrochloric acid, and hydrogen sulfide. The name solfatara, froms emitting hot sulfur dioxideProperties General Name Sulfur dioxide Chemical formula S O Appearance Colourless gas Physical Formula weight 64. 1 amu Melting point 198 K (-75 °C) Boiling point 263 K (-10 °C) Density 1. 4 ×103 kg/ m3 (liquid) Solubility 9. 4 g in 100g water Thermochemi and other gases. Further eruptions are considered likely in the future, including a risk of highly dangerous pyroclastic flows similar to those on Mount Pelée and Mount Vesuvius.

In prehistoric times, about 150,000 years B.P., a much larger explosive eruption occurred, probably of Volcanic Explosivity Index 7, creating Las Cañadas, a large caldera at just over 2000 m altitude, 15 km across east-west and 10 km north-south. On the south side, the internal crater walls rise as almost sheer cliffs from 2100 m to 2715 m at Guajara. The 3717 m summit of Teide itself, and its subsidiary vent Pico Viejo (3134 m), both in the northern half of the caldera, derive from eruptions subsequent to this prehistoric explosion.

The volcano and its surrounds, including the whole of the caldera, are protected in a national park, the Parque Nacional del Teide. Access is by a public road running across the caldera from northeast to southwest; a parador (hotel) is also within the National Park. A cable car (Teleférico Teide) goes from the roadside at 2356 m most of the way to the summit, reaching 3555 m.

Teide is also noted for a large number of endemic plants, including Cytisus supranubius (Retama del Teide, a species of broom), Echium wildpretii (Taginaste rojo, a spectacular species of bugloss reaching 3 m tall), and , a species of wallflower. Lower down, the middle slopes from 1000-2000 m are clothed with forests of Pinus canariensis (Pino Canario or Canary Island pine).