File:Emi Koussi ESA393723.jpg
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DescriptionEmi Koussi ESA393723.jpg |
English: Reminiscent of an artist’s pallet, this is the Emi Koussi volcano in northern Chad, imaged by the Copernicus Sentinel-2B satellite.
Emi Koussi lies at the southeast end of the Tibesti Mountains. At almost 3500 m, this pyroclastic shield volcano rises high above the surrounding sandstone plains. It is not only the highest mountain in Chad, but also the highest in the Sahara. Calderas, or depressions, can be seen nestling in the cap of the volcano. These are a result of magma erupting quickly and the surface collapsing into the partially emptied magma chamber. Emi Koussi is extinct and it is not known when it last erupted. The lack of vegetation allows wind and water to carve long grooves in the rock. These grooves can be 30 metres deep and several kilometres long. The Copernicus Sentinel-2 satellites carry innovative high-resolution multispectral cameras with 13 spectral bands. Processing the image here reveals differences in the minerals of the rock. For example, the green around the cone of the volcano is old lava, while sandstone in the surrounding area appear in reds and yellows. This image, which was captured on 27 November 2017, is also featured on theEarth from Space video programme. |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2018/05/Emi_Koussi |
Author | European Space Agency |
Permission (Reusing this file) |
contains modified Copernicus Sentinel data (2017), processed by ESA,CC BY-SA 3.0 IGO |
Other versions |
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Title InfoField | Emi Koussi |
System InfoField | Copernicus |
Set InfoField | Earth observation image of the week |
Location InfoField | Chad |
Mission InfoField | Sentinel-2 |
Activity InfoField | Observing the Earth |
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This image contains data from a satellite in the Copernicus Programme, such as Sentinel-1, Sentinel-2 or Sentinel-3. Attribution is required when using this image.
Attribution: Contains modified Copernicus Sentinel data {{{year}}}
Attribution
The use of Copernicus Sentinel Data is regulated under EU law (Commission Delegated Regulation (EU) No 1159/2013 and Regulation (EU) No 377/2014). Relevant excerpts:
Free access shall be given to GMES dedicated data [...] made available through GMES dissemination platforms [...].
Access to GMES dedicated data [...] shall be given for the purpose of the following use in so far as it is lawful:
GMES dedicated data [...] may be used worldwide without limitations in time.
GMES dedicated data and GMES service information are provided to users without any express or implied warranty, including as regards quality and suitability for any purpose. |
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current | 15:56, 4 May 2018 | 9,753 × 5,490 (7.44 MB) | Fæ (talk | contribs) | European Space Agency, Id 393723, http://www.esa.int/spaceinimages/Images/2018/05/Emi_Koussi, User:Fæ/Project_list/ESA |
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Width | 5,490 px |
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Height | 9,753 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2018 (Windows) |
File change date and time | 14:58, 5 April 2018 |
Color space | Uncalibrated |
Date and time of digitizing | 11:30, 29 January 2018 |
Date metadata was last modified | 16:58, 5 April 2018 |
Unique ID of original document | xmp.did:671fb20d-fa4c-044c-ae4a-7619a35e8d1f |