AR 13088 The sunspot that keeps giving!

[WildWill]

2 minutes ago, Solarflaretracker200 said:

Lmao but it’s true 

Yeah, we’ll… at least I made ya smile…maybe not a fruit loops moment, but you did laugh!  and like ya said, never know! 

Stay on top of those aliens Captain! We’re all counting on you! Or on bottom?? In Antarctica?? Well, you know what we mean…. I don’t.
Cheers!

WnAK

[Solarflaretracker200]

2 minutes ago, WildWill said:

In Antarctica

You weren’t supposed to know that I was there. Who told you? Anyways I hope for another X class. It would be nice. But hey, who knows lol

18 minutes ago, WildWill said:

it is a very rare sunspot, or so I hear… 😏

…and of course, what’s wrong with wishful thinking?? 😎

Well nothing is wrong with wishful thinking

[WildWill]

23 hours ago, Archmonoth said:

Thanks for the correction, although it is ridiculous. 

 

I understand Stonyhurst heliographic coordinates have the directions flipped, but if you look at the rotation from the top down (Northpole) its counterclockwise and the sunspots head EASTWARD. 

 

I don't disagree with you, and it's cool to learn something new, but I was describing the location as it appears, which I think is less confusing. 

Just a moment kind Sir. If you stand on the North Pole of the sun, looking downwards, it does indeed rotate counterclockwise. Which means the spots move from what we call the east limb to the what we call west limb, or westwards. The spots rise in the east and set in the west, that’s how I remember it… It would probably be easier if we used different terms for other orbs. Like we could make mork left and mindy right as they are here on earth. Then on the sun it would be mindy east, mork west…confused yet? I am.

I think imma gonna stick with rises in the east and sets in the west, which if you think about it, is correct. East is derived from the word for rising and west the word for setting. 

Cheers.

WnAK

[FredSchuller]

AR 13088 is still active! In the latest Solar Orbiter / EUI image from this morning, it's now reaching the western limb, which means that it will come into view from Earth within 1-2 days. Its heating of the corona is already clearly visible near the south-eastern limb in SDO/AIA images.

Also, it produced an estimated M9-class flare on Sept. 5, which triggered a major solar energetic particle event that has been lasting for several days!

BTW, about east and west, it's nothing specific to the Sun, but that's the way it is in astronomy. And this is perfectly logical, because you're looking in the direction of the sky and not at the ground below your feet (which is what is represented in a geography map). So if you keep pointing north upwards (as a convention), because you have to turn around to look at the sky and not the ground, then east and west are flipped!

 

[MinYoongi]

4 hours ago, FredSchuller said:

AR 13088 is still active! In the latest Solar Orbiter / EUI image from this morning, it's now reaching the western limb, which means that it will come into view from Earth within 1-2 days. Its heating of the corona is already clearly visible near the south-eastern limb in SDO/AIA images.

Also, it produced an estimated M9-class flare on Sept. 5, which triggered a major solar energetic particle event that has been lasting for several days!

BTW, about east and west, it's nothing specific to the Sun, but that's the way it is in astronomy. And this is perfectly logical, because you're looking in the direction of the sky and not at the ground below your feet (which is what is represented in a geography map). So if you keep pointing north upwards (as a convention), because you have to turn around to look at the sky and not the ground, then east and west are flipped!

 

Hey! Do you mind sharing the EUI imagery with me?

[Philalethes]

6 hours ago, FredSchuller said:

BTW, about east and west, it's nothing specific to the Sun, but that's the way it is in astronomy.

This is factually incorrect; as mentioned in a thread not too long ago, it's actually an old convention which has been changed for every single astronomical object except for a single one: Sol. In other words, it's highly specific, and not even really reasonable; it's simply vestigial at this point.

The new convention was established over 60 years ago:

Quote

In 1961, Commission 16 (i.e., Physical Study of the Planets) of the International Astronomical Union (IAU) established labels on the moon. They deemed east as the same direction as Mare Crisium on the moon. This means that, when you’re gazing at the moon, Mare Crisium is to the right, and therefore to the east. The IAU then applied this same rule to all celestial bodies but the sun. For some unexplained reason, the sun remained labeled as it had previously.

 

[Newbie]

On 8/31/2022 at 10:54 AM, MinYoongi said:

https://gyazo.com/0fccce7b286217f635b2871b1578ce43

 

are those post eruption arcades? Been rising since the eruption/flaring from 3088. 

can we measure the flares because of those sticking out?

It would appear the image above is what is described below as post-eruption loops, the whole structure being the post-eruption arcade.

Here is some more information on these structures and flare prediction.

Sourced from Wiki.

After the eruption of a solar flare, post-eruption loops made up of hot plasma begin to form across the neutral line separating regions of opposite magnetic polarity near the flare's source. These loops extend from the photosphere up into the corona and form along the neutral line at increasingly greater distances from the source as time progresses. The existence of these hot loops is thought to be continued by prolonged heating present after the eruption and during the flare's decay stage.

In sufficiently powerful flares, typically of C-class or higher, the loops may combine to form an elongated arch-like structure known as a post-eruption arcade. These structures may last anywhere from multiple hours to multiple days after the initial flare. In some cases, dark sunward-traveling plasma voids known as supra-arcade downflows may form above these arcades.

Flares occur when accelerated charged particles, mainly electrons, interact with the plasma medium. Evidence suggests that the phenomenon of magnetic reconnection leads to this extreme acceleration of charged particles. On the Sun, magnetic reconnection may happen on solar arcades – a series of closely occurring loops following magnetic lines of force. These lines of force quickly reconnect into a lower arcade of loops leaving a helix of magnetic field unconnected to the rest of the arcade. The sudden release of energy in this reconnection is the origin of the particle acceleration. The unconnected magnetic helical field and the material that it contains may violently expand outwards forming a coronal mass ejection. This also explains why solar flares typically erupt from active regions on the Sun where magnetic fields are much stronger.

Although there is a general agreement on the source of a flare's energy, the mechanisms involved are still not well understood. It's not clear how the magnetic energy is transformed into the kinetic energy of the particles, nor is it known how some particles can be accelerated to the GeV range (10⁹ electron volt) and beyond. There are also some inconsistencies regarding the total number of accelerated particles, which sometimes seems to be greater than the total number in the coronal loop. Scientists are unable to forecast when flares will occur.

Current methods of flare prediction are problematic, and there is no certain indication that an active region on the Sun will produce a flare. However, many properties of sunspots and active regions correlate with flaring. For example, magnetically complex regions (based on line-of-sight magnetic field) called delta spots produce the largest flares. A simple scheme of sunspot classification due to McIntosh, or related to fractal complexity is commonly used as a starting point for flare prediction. Predictions are usually stated in terms of probabilities for occurrence of flares above M- or X-class within 24 or 48 hours. NOAA issues forecasts of this kind. The prediction model was developed at the University of Alabama in Huntsville with support from the Space Radiation Analysis Group at Johnson Space Flight Center (NASA/SRAG) for forecasting M- and X-class flares, CMEs, fast CME, and Solar Energetic Particles. 

N.