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That's spectacular. I dream of seeing arcs near the anthelion, those seem so surreal...
Thanks! I'll have more to share in a moment, as well.
They are very visible and a silvery to eerie electric blue to the eye. My photo above is a few seconds exposure and it appears somewhat brighter and more colorful than what the eye sees. It is similar to capturing aurora.
I don't think this is very conclusive. There are hardly any clear descriptions of the aurora borealis either going back more than a few centuries. Greek and Roman writers describe the long winter nights of the north, surely if they saw the aurora, they would have described it? Well, no records exist which clearly describe the aurora. Yet we can be pretty sure that the aurora was there.
I think it depends on your latitude. At your latitude, the clouds are likely only seen low over the northern horizon, so it needs to be fairly dark. At higher latitudes, however, these clouds can cover the entire sky, and then you need the sun closer to the horizon to touch the clouds towards the south. The northern horizon might then be too bright, but who cares if the rest of the sky is filled with these clouds?
I didn't know about the rare clouds connection to climate change before.....will have to look into it further. Tell you what though, what's been going on in Siberia for several months now is pretty conclusive. I understand why Russia is in the business of denialism too, they think Siberia is going to be the world's new bread basket.I don't think this is very conclusive. There are hardly any clear descriptions of the aurora borealis either going back more than a few centuries. Greek and Roman writers describe the long winter nights of the north, surely if they saw the aurora, they would have described it? Well, no records exist which clearly describe the aurora. Yet we can be pretty sure that the aurora was there.
I think it depends on your latitude. At your latitude, the clouds are likely only seen low over the northern horizon, so it needs to be fairly dark. At higher latitudes, however, these clouds can cover the entire sky, and then you need the sun closer to the horizon to touch the clouds towards the south. The northern horizon might then be too bright, but who cares if the rest of the sky is filled with these clouds?
Nacreous clouds are interesting. They can be insanely bright, so if you try to photograph them, either the clouds will be overexposed or the landscape underexposed.