Arsia Mons, August 4, 2019: the volcano wakes up!!!
After months of no observation and an apparent quiescence since last June 19 (see https://www.facebook.com/PianetaMarte.MdM/photos/a.1625578140858706/2260042377412276/), the activity of Arsia Mons definitely seems to resume in a big way!
Ridiculous explanations such as “seasonal phenomenon” or “orographic cloud” no longer hold up and it is time that someone decided to give more credible explanations.
Not only a nice puff coming from the volcano itself, but also a nice “cloud” visible well beyond the border between day and night (terminator). In fact, the “cloud” connected to the puff of Arsia Mons (top left) must soar well over 60 km altitude to be visible at that distance from the terminator, an altitude at which not even on Earth similar clouds are formed, despite the fact that the Earth has an atmosphere (officially!) 100 times denser!
Original image: https://www.flickr.com/photos/esa_marswebcam/48462619377/
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