Thank you, Hugo.
Yes, it is astonishing with how much detail Otto Muck explains it all
Please note when reading the following that central Europe before 9498 BCE was, from the North Pole up to a longitude of about London - Paris - Vienna, covered in a thick ice sheet.
Re. the 'post 9498 BCE cloud':
Otto Muck tells us that it was 'thickest in the north due to the greater number of volcanoes there (Iceland region).
'The prevailing winds carried it eastwards and upwards. But in the stratosphere the wind directions are reversed. So the cloud ' over northern Europe was 'forced into a circular movement - pulling higher and higher and becoming denser' and it was over Europe with its 'slowly receding ice sheet where the downpour of mud was the heaviest.... "And it is from this region that the myth originates of the slain primeval god in whose blood the whole world was drowned" (Tiamat? (1a) Osiris (1b)?
'The cloud was reinforced by the warm waters from the Gulf Stream' which {no longer made a U-turn when hitting the island of Atlantis but} it now flew all the way to Europe' . and 'its mild current bathed the icesheets that covered Europe' - the mainland and much of the North Sea (England was connected with mainland Europe then and you could walk straight to Denmark), 'water vapor from the steaming sea (as a result of the many volcanic eruptions) rose up 'and constantly swelled the volume of the cloud... The postglacial period in the northern hemisphere, particularly in Europe was a very long dark period, indeed... The very name Europe originally meant 'world of darkness'"
He then explains that due to the lack of sunlight nearly all forms of plant life were crippled (except some mosses, white dryas and arctic willows..."As most of the plants vanished so did most of the animals and humans that depended on them.
It was this 'beyond belief endless night lighted only by a dim glow which found its way into many of the ancient the myths:
According to OM it became the abode of some Greek gods of the dead - Hades (1c) Hell, the realm of Tartarus, Erebus (1d) and Persephone's realm of shades (1e) and Homer's Cimmerian nights (1f). It became as well a part of the Nordic saga ("the swirling mists of the Nordic Hel") - there were not many humans then but they still passed on their memories (like the saga of Nilheim which forms part of the famous Edda (1).
As there was not much green, CO2 absorbing vegetation the CO2 remained very long in the air ... The melting inland ice sheets caused the sea levels to rise by 100 m and many land connections (e.g. England and mainland Europe, PNG and Australia) became islands. Five thousand years passed (9498 BCE - 5000 = 4849 BCE) before the glacial climate gave way and Europe became 'a lighter place with a better climate'.
There are many, many more and much more minute details about the development of the earthly climate and vegetation - too many to mention here. But one further phenomenon that characterized this period of darkness: should be mentioned:
"When the clouds from the eruption of Krakatoa ascended to the high atmosphere (2) they were seen as particularly luminous silver clouds at night because these particle rich clouds were so high up in the atmosphere that they were (like a satellite) lit by the sun at night. As the volcanic eruptions caused by the Mu asteroid hit were some 20,000 times more powerful than Krakatoa's these silvery night clouds were much larger and to someone more south looking to Europe's north they appeared as 'huge shining white mountains, much higher than the Himalayas' creating the belief that they must be the abode of gods and beyond them lay the Elysian Fields (3) inhabited by the Titans and Giants.
"These gloomy mists have long since gone. But they still cover our ancient European past and shroud the origins of the white race - risen from the Atlantic catastrophe - in mystery...."
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(1a) https://en.wikipedia.org/wiki/Tiamat
(1b) https://www.britannica.com/topic/Osiris-Egyptian-god
(1c) https://en.wikipedia.org/wiki/Hades
(1d) https://en.wikipedia.org/wiki/Tartarus
(1e) https://en.wikipedia.org/wiki/Persephone
(1f) https://en.wikipedia.org/wiki/Cimmerians
(1)
It could be that the ancestors of the Vikings (blond hair - blue eyes like Semjase) who may have transmitted the Nordic sagas may have had this origin:
Semjase in CR 70
https://www.futureofmankind.co.uk/Billy_Meier/Contact_Report_070
- Still to mention is that among the very distant descendants of Arus, who had subjugated the lands in the north, there existed elements in great number, who, until in the time of Jehav, preserved themselves as the Arusists.
- These, a group of 160,000 humans, were named the Great Aryans, because they still advocated the ideas of Arus the First.
https://www.futureofmankind.co.uk/Billy_Meier/Contact_Report_070
(2)
They seem to settle in the northern sky:
E. Munch lived in Norway. His painting 'The Scream' - the blood red skies - they appeared for about 4 months in the sky in Norway.
https://skyandtelescope.org/press-releases/astronomical-sleuths-link-krakatoa-to-edvard-munchs-painting-the-scream/
(3)
https://www.thoughtco.com/what-were-the-elysian-fields-in-greek-mythology-116736
Clemens of Alexandria identified the Elysian Fields with the country of the Hyperboreans (we know that this was Florida) and Ptolemy called the Hyperborean Ocean the "Sea of the dead"
https://www.britannica.com/biography/Ptolemy
https://en.wikipedia.org/wiki/Clement_of_Alexandria