Strange Clouds
The crew of the ISS have been observing electric-blue "noctilucent" clouds hovering on the edge of space.

They hover on the edge of space. Thin, wispy clouds, glowing electric blue. Some scientists think they're seeded by space dust. Others suspect they're a telltale sign of global warming.

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Maybe it appeared everytime when geomagnetic pole flipping. Just a guess...

No, they're simply a natural phenomenon of summer in the hemisphere, when the sun is lower below the horizon.