PSC’s Spill Out of the Arctic

This occurs amid amplitudes at the very highest ranges possible in the Schumann Resonamce today. Almost off the charts as far as amplitude hertz levelsat mid.ight in Russia.

CHANCE OF FLARES TODAY: Don’t be surprised if there is an M-class solar flare today. At least three sunspots have unstable magnetic fields teetering on the edge of such an explosion: AR3519, AR3521, AR3529. NOAA forecasters peg the odds at 40%. Any flares will probably begeoeffective; two of the sunspots are directly facing Earth. Solar flare alerts: SMS Text


Above: An M3-class solar flare from AR3519 on Dec. 22, 2023

PSCs SPILL OUT OF THE ARCTIC: Normally, polar stratospheric clouds (PSCs) are confined inside the Arctic Circle. Only above the poles can the stratosphere become cold enough to create these rare clouds. However, during this week’s outbreak of PSCs, the clouds have spilled out of the Arctic to places they are seldom seen. Last night, Vincent Phillips witnessed their aurora-like colors near Liverpool, UK:

“A small gap in storm Pia’s cloud cover just after sunset revealed this stunning display of polar ptratospheric clouds,” says Phillips. “We saw them from Hale village near Liverpool [more than 13 degrees below the Arctic Circle].”

Widely considered to be the most beautiful clouds on Earth, polar stratospheric clouds are a sign of extreme cold. PSCs form when the temperature in the Arctic stratosphere drops to a staggeringly-low -85 C. Then, and only then, can widely-spaced water molecules in the dry stratosphere coalesce into tiny ice crystals. High-altitude sunlight shining through the crystals creates intense iridescent colors that rival auroras.

Something new: For the rest of this northern winter season, we will publish daily predictions of temperatures in the Arctic stratosphere. This will help sky watchers know when to look for these rare clouds. The predictions are right here.

more images: from Ian Carstairs of Harleston, Norfolk, UK; from Stu Nock of Manchester, UK; from Shaun Greenwell of Newcastle upon Tyne, UK; from Alan C Tough of Elgin, Moray, Scotland; from Lesley Robertson of Black Isle, Scotland; from Sheri Karl of Aberdeen, Scotland; from Jamie McBean of Herne Bay, Kent, UK; from Tomas of Perthshire, Scotland; from Gordon Ward of Hightown Castleford UK; from Les Brooks of East Shore Village, County Durham, UK; from Michael Horne of Luncarty, Scotland; from Steve Brown of North Yorkshire, UK;

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