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Volcanic Sunset, Sweden imaged by P-M Hed�n (photography site) on Friday 5th September. Image ©P-M Hed�n, shown with permission.

Volcano Kasotochi's dust and sulfate aerosol now encircles the Northern hemisphere. Satellite measurements, see this animation, show skein-like clouds ever progressing eastwards in the stratospheric winds.

The clouds, shining yellow in the high altitude sunlight, are easily visible after sunset and binoculars show up their fine structure. Look also for pink rays and the violet sky overhead.