Return of the extremely elongated cloud on Mars

Posted on July 30, 2020 2:49 pm
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A mysteriously long, thin cloud has again appeared over the 20-km-high Arsia Mons volcano on Mars.

A recurrent feature, the cloud is made up of water ice, but despite appearances it is not a plume linked to volcanic activity. Instead, the curious stream forms as airflow is influenced by the volcano’s ‘leeward’ slope − the side that does not face the wind.

These images of the cloud, which can reach up to 1800-km in length, were taken on 17 and 19 July by the Visual Monitoring Camera (VMC) on Mars Express, which has been studying the Red Planet