Pico Viejo is a volcano located on the island of Tenerife (Canary Islands, Spain). It is the second highest peak of Tenerife and the Canary Islands (after the Teide) with a height of 3,135 m above sea level, a huge crater approximately of 720 metres in diameter.
It erupted in 1798, and it is estimated[by whom?] that it ejected around 12 million m³ of lava over three months forming a black coloured surface, which is different from the rest of the volcano area, which are known as the Teide noses.
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