Interesting. These are not gravitational waves, as the name implies, but rather a phenomenon in fluid dynamics (as the article just about states outright): https://en.wikipedia.org/wiki/Gravity_wave
The new findings could explain why green ghosts are so infrequent in the skies. In four years of observations, Spanish scientists have only located one. "We didn’t expect there to be so much iron density at that altitude. It comes from meteors that enter the atmosphere at high speed, burn up and [then] the metal atoms are left suspended. The iron layer is normally a little bit higher. In our case, we hypothesized that on that day there were gravity waves [a wave phenomenon in the air] and the iron layer was lowered,” says Passas Varo.
Interesting. These are not gravitational waves, as the name implies, but rather a phenomenon in fluid dynamics (as the article just about states outright): https://en.wikipedia.org/wiki/Gravity_wave
Interesting. These are not gravitational waves, as the name implies, but rather a phenomenon in fluid dynamics (as the article just about states outright): https://en.wikipedia.org/wiki/Gravity_wave
Archive link for folks getting an error on the page: https://web.archive.org/web/20231213002301/https://english.elpais.com/science-tech/2023-12-12/the-origin-of-mysterious-green-ghosts-in-the-sky-has-been-discovered.html