Questions tagged [coronal-mass-ejection]

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Electromagnetic Profile for CME over time in the region of a geostationary satellite?

My specific question is what/how would the electromagnetic field profile be over time for a coronal mass ejection at the orbital radii for a typical geostationary orbit at around 35 000 km be? The ...
Kishan Bhatt's user avatar
1 vote
1 answer
88 views

Where do these materials on the Sun come from, if not nothingness?

In this video, I see that for hours, it seems that the flow keeps going from the 11h direction to the Sun's surface - while there looks like nothing is coming to the top of the loop to provide a ...
longtry's user avatar
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1 answer
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Could a sheet of plasma ejected from the sun's surface magnetically reconnect with itself and eject bits of itself which then also reconnect?

Could the Corona of the sun be getting heated by large sheets of plasma ejecting smaller sheets and these in turn ejecting smaller sheets ?
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-2 votes
1 answer
201 views

What caused a huge piece of the Sun to break off?

There seems to be a huge piece of the sun that broke off at approximately 53 degrees. There's at least one article that describes it in these terms. This, to me, seems to be a CME (Coronal Mass ...
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6 votes
1 answer
454 views

Where do Coronal Mass Ejections go?

Due to magnetic fluctuations in the Sun's corona, the Sun produces Coronal Mass ejections (CMEs). Where does the matter from these CMEs go if they don't hit any celestial object? Are they visible from ...
Tapan Gupta's user avatar
4 votes
1 answer
195 views

What does the surface of a star look like in visible light?

False colour images of the Sun show a highly complex structure near the surface with matter ejected and suspended in magnetic fields. But are solar prominences and coronal mass ejections visible to ...
dubious's user avatar
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1 vote
2 answers
228 views

how much advanced notice would we have for an Earth bound coronal mass ejection?

According to wikipedia the 1859 Carrington Event was caused by a coronal mass ejection (CME) of plasma. As it's plasma and not photons it stands to reason that the CME would not be traveling at the ...
neubert's user avatar
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What happened to the predicted geomagnetic storm on 2021-10-31?

There was widespread media coverage in advance of of a predicted G3 storm on 2021-10-31 due to a CME. For instance, https://www.npr.org/2021/10/30/1050810514/northern-lights-halloween-2021: A solar ...
D0SBoots's user avatar
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2 votes
0 answers
130 views

Help finding a database or analysis of plage regions on the Sun

Plages are phenomena of stellar activity. A plage is a bright region in the chromosphere of the Sun, typically found in and around active regions. The term itself is poetically taken from the French ...
Autodidact's user avatar
5 votes
1 answer
40 views

What online tools are available to investigate and classify solar eruptions?

I was just casually browsing when I came across a link about at recent solar flare. So I went to investigate at SpaceWeather. There it was stated: Looking further down the page it seem to say that ...
not2qubit's user avatar
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What would be the effects of a -400 nanotesla geomagnetic storm on modern electronics? [closed]

After reading the Wikipedia article on geomagnetic storms, I'm curious about what the effects of a -400-nanotesla-minimum geomagnetic storm would be on modern military and consumer electronics. The ...
KEY_ABRADE's user avatar
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1 answer
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Strength of the relationship between very large solar flares, coronal mass ejections, and solar proton events?

In the years 774-775 and 993-994, there were large peaks in Earth's atmospheric radiocarbon (14C) concentration. While the cause was initially disputed, Mekhaldi et al.'s 2015 study of annually ...
Gabriel's user avatar
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5 votes
2 answers
162 views

Directionality of solar flares

I have read a number of articles about Coronal Mass Ejections (CME) and solar flares and I’m trying to establish how directional the radiation from them is. I am aware that radiation from these solar ...
Slarty's user avatar
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14 votes
3 answers
3k views

How are the solar flares from May 23, 2021 extraordinary?

The Space Weather News for May 23, 2021 reads (with some highlighting by me) Yesterday, the sun produced a sequence of solar flares unlike anything we've seen in years movie. Earth-orbiting ...
B--rian's user avatar
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1 answer
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What is the lower limit of a coronal mass ejection?

Reading an 2005 article by Fraser Cain called Smallest Ever Coronal Mass Ejection I became interested in the exact definition of CME. It seems like a simple question - but I did not manage to find ...
B--rian's user avatar
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2 votes
1 answer
113 views

Physical properties of the stellar corona?

I am after the basic physical properties of the corona of a star, here some questions for which I would like to have an answer, even only for a subset of them: I know some things about the corona of ...
B--rian's user avatar
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3 votes
2 answers
93 views

Calibrating raw photometric measurements

So I have a photometry data sourced from Solar Mass Ejection Imager's (SMEI) server as an ‘add-on data’ for my point source of interest (a variable star) with a 104 minute cadence. However, it’s not ...
CGHA's user avatar
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6 votes
1 answer
215 views

What effects do CMEs have on planets like Mercury?

Some Background? Coronal Mass Ejections, or CMEs for short are the topic of this question. Anyone new to this topic is sure to find some really interesting facts (and consequences) of CMEs and Solar ...
Infinity Milestone's user avatar
4 votes
2 answers
169 views

Solar flares/CME dangers to life?

I know a repeat of the 1859 Carrington Event (coronal mass ejection) would pose a severe risk to power grids and telecommunication networks but wouldn't pose an immediate threat to life. If a large ...
Bob516's user avatar
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2 votes
1 answer
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Detecting anomalies from the sun from home

I was wondering if there are any ways for some amateur to detect let's say solar flares or CMEs from home. What kind of hardware would you need in order to have chance of seeing/measuring those? I ...
CCG's user avatar
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Does Earth's magnetic field become stronger when a solar flare hits?

This curiosity arises as follows: when ejecta from a strong solar flare hits Earth, will the Earth somehow counter its impact with a stronger magnetic field. Or, earth's magnetic field as limited ...
Ubi.B's user avatar
  • 221
5 votes
1 answer
164 views

Why do CME's "zig-zag" on their way to Earth?

This answer to When a coronal mass ejection (CME) hits a spacecraft, from which direction will the particles come? states: A single CME will impact a spacecraft from only one direction, but that ...
uhoh's user avatar
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3 votes
3 answers
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Does coronal mass ejection include radiation at optical wavelengths?

It is known that during Solar/Stellar Flare, plasma from the corona of the star is released into the space, and travels comparatively slowly. In an hypothetical situation, does the coronal mass also ...
Rudra Pratap Sinha's user avatar
2 votes
1 answer
98 views

What phenomena was this video from SOHO actually showing?

My friend showed me a video of a CME that looked as if it was swirling into a gigantic circular "spaceship" or "UFO" and he explained it as "an alien ship potentially refueling". I did a bit of ...
Magic Octopus Urn's user avatar
3 votes
1 answer
56 views

how accurate are the predictions for coronal mass ejections-(location, timing and magnitude)?

I suppose this applies to all solar events. I know centuries ago they knew the quantity of these things fluxuated in solar cycles. Apart from that I know there has been advancement in solar weather ...
Paul's user avatar
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1 vote
1 answer
117 views

Can CME destroy planetary rings?

Is Corona Mass Ejection able to reach the outer planets such as Jupiter and Saturn? If so can it blows away the icy rings or the distance is simply beyond the reach of maybe like Earth it is protected ...
user6760's user avatar
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6 votes
1 answer
189 views

Might someone see changes to the corona during a solar eclipse?

I've seen many pictures of the corona during a solar eclipse, and the structure and delicacy is amazing. Clearly, the appearance would change over time, depending on the fine details of the solar wind ...
Daniel Griscom's user avatar
7 votes
1 answer
279 views

Difference in creation of solar flares and CME?

What is the difference in the creation process of solar flares and CME (coronal mass ejections)? How do they relate to sunspots and coronal holes? Here there are some good explanations about the ...
Helen's user avatar
  • 399
2 votes
1 answer
418 views

How was the acceleration calculated for this CME (Coronal Mass Ejection)?

I am looking at data used in a project to get the velocity and acceleration of a CME (Coronal Mass Ejection). I understand how the velocity was calculated, and for the acceleration, I get the v2-v1 ...
John Michaels's user avatar
4 votes
2 answers
429 views

What is the force of a CME on objects in space?

I've been reading a little bit about coronal mass ejections lately and they seem really interesting, and they cause a lot of amazing things to happen. However, one thing I haven't seen is the physical ...
duzzy's user avatar
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5 votes
1 answer
153 views

Conditions on Hot Jupiters

Hot Jupiters are close to their parent star - after all, that's why they're so hot. Their atmospheres are thought to be slowly blown away by the parent star, and they will eventually become chthonian ...
HDE 226868's user avatar
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8 votes
1 answer
64 views

Are we still in the Solar Maximus stage? Will this winter 2013/14 be a good aurora-viewing season?

I remember reading in 2011 that 2013/2014 would be the peak of the current solar maximus, but I want to confirm whether that is still ongoing. Will the upcoming winter season be a good time to see ...
Kathryn Hill's user avatar
21 votes
2 answers
3k views

What are the main differences between solar flares and coronal mass ejections?

Specifically, what causes them, what sort of damage can they cause, and what are the differences in their composition?
David Freitag's user avatar