PSCs typically appear two or three times every winter in response to cold waves in the stratosphere. Cloud cover has been pretty extensive in NW Europe recently, so I am sure more locations would have seen these amazing clouds if not.' 'For example, you can see that with big gaps in Germany. ' I've almost certainly missed out on some locations as I can't have scoured *everything,*' says McBean. reader Jamie McBean created this map of sightings drawing on a variety of sources: 'I used the SpaceWeather Photo Gallery, Twitter, Facebook and other forums such as Netweather for the UK and 3BMeteo for most of the sightings from Italy,' says McBean. Normally confined inside the Arctic circle, the aurora-like clouds descended all the way to Italy and the south of France: The result was a widespread outburst of polar stratospheric clouds (PSCs). 17th-24th, temperatures in the Arctic stratosphere dipped to a 40-year low. WIDESPREAD POLAR STRATOSPHERIC CLOUDS: Last week, Dec. Maybe next time! CME impact alerts: SMS Text Either way, the chances of a geomagnetic storm today have subsided. Either it missed or it is moving more slowly than expected. GEOMAGNETIC STORM WATCH-CANCELED: A CME expected to graze Earth on Dec. As the season progresses, these dots will multiply in number and shift in hue from blue to red as the brightness of the clouds intensifies.

For the rest of the season, daily maps from NOAA 21 will be presented here:Įach dot is a detected cloud. An instrument onboard NOAA 21 ( OMPS LP) is able to detect NLCs (also known as 'polar mesospheric clouds' or PMCs). The first clouds were detected inside the Antarctic Circle on Dec. The southern season for NLCs is underway.

27, 2023, the Arctic stratosphere is too warm for Type II polar stratospheric clouds. NASA's MEERA-2 climate model predicts when the air up there is cold enough:

Credit: SDO/AIAĬolorful Type II polar stratospheric clouds (PSC) form when the temperature in the stratosphere drops to a staggeringly low -85C. Solar wind flowing from this coronal hole should reach Earth on Jan 1, 2024. Switch to: Europe, USA, New Zealand, Antarctica Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays. Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is intensifying, and this is reflected in the number of cosmic rays entering Earth's atmosphere. All of these sunspots have stable magnetic fields that pose no threat for strong solar flares.

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