Satellite Eye on Earth: January 2018 - in pictures

Sahara snow and volcanic colours are among the images captured by Nasa and the ESA last month

Rare snowfall in north-west Algeria, on the edge of the Sahara desert. Despite the desert at times being one of the hottest places on Earth, the snow was reported to be up to 40cm thick in some places. Although temperatures plummet during the night, snowfall is very unusual in the Sahara because the air is so dry. It is only the third time in nearly 40 years that this part of the desert has seen snow.