DONEGAL photographer Adam Rory Porter has done it again.
The man whose pictures of the Northern Lights over the county went global has captured another incredible phenomenon in our skies – a 22 Degree Halo.
His picture this evening in Buncrana captures it beautifully
“We always get stunning sunsets on the shores of Lough Swilly and every now and then we get the odd rare phenomenon too,” he laughed.
A halo is a ring of light surrounding the sun or moon. Most halos appear as bright white rings but in some instances, the dispersion of light as it passes through ice crystals found in upper level cirrus clouds can cause a halo to have colour.
A 22 degree halo is a ring of light 22 degrees from the sun (or moon) and is the most common type of halo observed and is formed by hexagonal ice crystals with diameters less than 20.5 micrometers!
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