A rare event and one I’ve not seen previously presented itself on Monday evening: nacreous clouds or, to give them their technical name, Polar Stratospheric Clouds (PSC’s). Whilst the ones that appeared over the Wirral Peninsular were colourful, there were better displays to be seen throughout the, most notably in Edinburgh (Scotland).
PSC’s are are best observed during civil twilight when the sun is between 1 and 6 degrees below the horizon. The clouds are considered to be involved with the formation of holes in the ozone layer.
Images © Tony Harratt/The Fuji Freak – 2016