2021-07-25

Copernicus Sentinel 2 “Space Exploration of the Earth” series: Tarso Toussidé volcanic hills

By yqqlm yqqlm

Copernicus Sentinel 2 “Space Exploration of the Earth” series: Tarso Toussidé volcanic hills

The volcano spewed out magma, rocks and volcanic glass fragments, lava And volcanic ash, in the middle of this area is Pic Toussidé, a dome of lava that can be seen protruding from the caldera.

Toussidé is one of the youngest volcanoes in Tibesti. It has a large number of smoke holes (openings in or near the volcano through which gas emerges) on its top, which mainly emits water vapor. With a temperature of 40-60°C, it is also the only active volcano in Tibesti.

On the far right of the image, is the Trou au Natron caldera, which is located about 2450 meters above sea level.

Most of the surface of the crater has white salt crusts, including sodium carbonate. These crusts are usually formed when a small vent at the bottom of the crater emits mineral-rich steam. When this steam evaporates at high temperatures, the minerals are left behind.

The irregular diameter of the caldera is about 6-8 kilometers, and it is 1,000 meters deep. It is said that it was filled by a freshwater lake at the maximum of the last ice age. On the left side of the image, red shows the sparse vegetation along the short stream.

Satellite imagery is a practical method for studying remote areas, such as the volcanic area of ​​the Tibesti Mountains. The Copernicus Sentinel 2 mission carried a multispectral imager with 13 spectral bands, with a wide scanning coverage, and providing data on the earth’s land every five days.

Related articles: Exploring the Earth from Space: Copernicus Sentinel 2 in the Strait of Gibraltar from the Satellite Perspective “Space Exploring the Earth” this week takes us to Los Cabos, Mexico. Sentinel-3 showcases the spectacular scenery of the Great Lakes in North America. Copernicus Sentinel 2’s “Space Exploration of the Earth” will take us a bird’s eye view of Chongqing, China this week