Bogoslof Island: a puzzle for geographers.
Bogoslov Island has a Russian sounding name and indeed belongs to the Aleutian Islands, Alaska which was sold by Russia to United States in 1867. It is actually the summit of a stratovolcano 1800 m height from the seabed and emerged from the ocean in late 1800 after an underwater eruption and since then has been
Volcanoes seen by Sentinel-2
On Earth, 500-600 Volcanoes exist. A volcano is a relief of the terrestrial crust (submarine or air) formed by the ejection and stacking material from the rise of magma in the form of lava ash. Volcanic activity can take several forms; each of them depends on the quantity of gases present in the magma and