Sol (Sun) and its phenomena

[Gaby]

Bringing these updates to highlight the decision of NOAA to change reading instruments at the last minute, opting for ones that are less reliable, and how unusual this storm is turning out to be.

Лаборатория солнечной астрономии (XRAS)

На Земле происходит магнитная буря уровня G4.7 Очень сильная магнитная буря планетарного масштаба, почти достигшая высшего уровня G5, регистрируется в данный момент средствами контроля геомагнитной обстановки в связи с приходом к Земле первого из трех плазменных облаков, ожидающихся в течение...

t.me

Unfortunately, spacecraft operating near the Earth and measuring the parameters of the solar wind have been transmitting strongly distorted values for the last few hours (Солнечный ветер 12 ноября 2025 года ). For an unknown reason, NOAA has replaced the main device for measuring ACE solar wind parameters with a backup DSCOVR, which is very unstable and currently producing many failures. From the incoming "broken" data, one can only understand that exceptionally high plasma density and temperature are recorded in the vicinity of the Earth, exceeding the usual ten times, as well as very high values of magnetic field induction, which are at the level of historical peaks.

Лаборатория солнечной астрономии (XRAS)

Продолжает регистрироваться очень интенсивное воздействие солнечных заряженных частиц на космические аппараты. По данным околоземного спутника GOES-R плотность протонов с энергиями более 10 МэВ повышена в настоящий момент примерно в 10 тысяч раз. Потоки частиц с энергиями 100 МэВ увеличены...

t.me

According to the GOES-R near-Earth satellite, the density of protons with energies greater than 10 MeV is currently increased by about 10,000 times. Particle fluxes with energies of 100 MeV are increased by about 200-300 times. Located at a great distance from Earth, outside the protective effect of the magnetosphere, the SOHO spacecraft does not actually provide data on the Sun at the moment, since the telescope detectors are completely covered with traces of energetic particles hitting them (in the picture), which can only be seen with great difficulty. As noted earlier, NOAA, for unknown reasons, stopped transmitting data from the ACE spacecraft located at the same location a few hours ago and designed to directly measure the parameters of the solar wind. At the same time, there were also no failures or failures of the device. Currently, the measurements, although in a very distorted form (Солнечный ветер актуальные данные ), come from the DSCOVR backup device.

Лаборатория солнечной астрономии (XRAS)

Довольно наглядная визуализация взрывного начала сегодняшней бури от американского агентства NOAA, Цветовая шкала показывает амплитуду геомагнитных колебаний в разных регионах земного шара. Хочется верить, что Вы читаете это не с одной из антарктических станций, хотя северная часть России выше...

t.me

Information is being received from orbit about the parameters of the interplanetary magnetic field close to historical records against the background of very low solar wind speeds. In general, this combination of parameters looks so unusual that there are even doubts about its reliability. The current magnetic storm is developing unevenly. Moderately perturbed periods alternate with impulsive bursts. The forecast of the development of a magnetic storm formed the day before by world centers has already been completely refuted from the very beginning of the event, and now the situation is being monitored simply by the fact. The G5 level has not yet been reached, but with the observed values of the interplanetary magnetic field of about 50 Nt, the Earth's magnetosphere can reach it now at any moment.

 

[Puma]

Solar wind Speed is normal, 419 km/sec but IMF is now 45nT

11:48 UTC Nov 12, 2025

We continue with a severe G4 geomagnetic storm with a Kp 8. The solar wind speed has increased to 512 km/sec.

Auroras were reported in Zacatecas Mexico​

Un minuto de ciencia

​

 

[mkrnhr]

According to the spaceweather website, Spaceweather.com Time Machine

Yesterday's X5-class solar flare from sunspot 4274 hurled a fusillade of energetic protons toward Earth. Some of the particles are so powerful, they are penetrating the atmosphere all the way to the ground. "This is a very significant event," says Professor Clive Dyer of the Surrey Space Centre. "Neutron monitors around the world are detecting it."

This is called a Ground Level Event (GLE). GLEs of this magnitude are rare; they happen only once or twice every solar cycle. "This one is comparable to the GLE of Dec. 13, 2006," says Dyer. That makes it a ~20-year event.

Space-based cameras are being disturbed by the flux of protons:

https://spaceweather.com/images2025/11nov25/snow.gif

 

[dredger]

To add to the information, this short animation is well explicit :

https://twitter.com/x/status/1988414973857747071