Sol (Sun) and its phenomena

[Olivierlejardinier]

There's still farside flaring, it will take about 8 days for AR4274 to return.

There was a full-halo CME this evening (UTC), apparently coming from a far side source. From the geometry of the CME it looks like the source region might be in the northern hemisphere, close to the far side central meridian - possibly 4274.

https://twitter.com/x/status/1992017874345673042

From spaceweather.com, 3I/ATLAS behaving like a normal comet, still discharging the solar capacitor:

INTERSTELLAR COMET 3I/ATLAS IN COLOR: Who needs satellites and space agencies? Using a backyard telescope on Earth, amateur astronomers Michael Jäger and Gerald Rhemann have just captured the best-yet color image of interstellar visitor 3I/ATLAS. It is unmistakably a comet.​

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With one exception (discussed below), the photo is "classic comet." The comet's long tail streams straight away from the sun, sculpted by solar wind. Its blue color comes from carbon monoxide ions, CO+, a compound found in almost all Solar System comets. The comet's head is green because of another common molecule, diatomic carbon (C2), which is released from icy comet cores when they get close to the sun.


Now for the exception: There is a jet poking out of 3I/ATLAS's head toward the sun. It stands out in this black-and-white image taken by Michael Jäger and Gerald Rhemann on Nov. 20th:

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[Gaby]

Auroras in the eastern hemisphere, thanks to a fast flow of plasma from a coronal flow.

Лаборатория солнечной астрономии (XRAS)

t.me

An intense aurora zone is forming over the country right now. Anyway, so far everyone here has been having fun with parodies of the coronal hole (Лаборатория солнечной астрономии (XRAS) ), a stream of plasma from it hit the Earth. Two days earlier than the forecast. Satellites record a rapid increase in the speed and temperature of the solar wind in the vicinity of the planet. There are no magnetic storms yet, but they usually develop with a delay of several hours. In the eastern hemisphere of the Earth, there is currently a rapid growth of the aurora zone, the lower boundary of which has descended in the last half hour to latitudes of about 55 degrees (Moscow, Kazan, Nizhny Novgorod).

The coronal hole at the moment, frankly speaking, has not yet reached those corners very much (https://xras.ru/database/sun_images/2025/aia211/202511/20251124_121757_aia211.jpg ), from which the wind flow was supposed to come to the Earth. This is approximately 50 degrees west (to the right) of the center of the visible disk. It is even surprising to look at the graphs in this regard, but the nature of measuring the velocity and density of gas leaves no doubt about the nature of the rapid flow that came to Earth: this is plasma born in a coronal hole. Let's see what happens next.