Thehas never recorded so many in the sky only at the end of June: this is a record intensity for the phenomenon since the start of the 2007 surveys. are visible, for the luckiest observers of the around the period of .
It was indeed at this time that theis the coldest and that the fine dust of coated in ice can be seen as bluish filaments that sparkle in the sky at night. These clouds are the highest that exist, since they form at an average altitude of 80 kilometers above the ground.
A real “outbreak”, an appearance in large numbers, was detected by NASA on June 30, including in Europe: up to 40% more noctilucent clouds compared to the 2007-2021 normal.
A peak of intensity whose origin is a priori not natural! NASA believes it is likely due to satellite launches andespecially which took off on June 19. It takes 10 days for the water vapor from the satellites to disperse into the mesosphere, which coincides with the June 30 peak.