Sun now has only a south magnetic pole?

In summary, the sun's regular oscillation in the location of its magnetic poles is currently not synchronized, with the north pole having reversed to south while the south pole remains a south pole. This process is not uncommon during periods of high sunspot activity and does not result in the sun having only one pole. It is believed that the varying electric currents within the sun's plasma composition contribute to the changing magnetic field. This phenomenon is noteworthy but not historic, and has been observed in the past during periods such as the Maunder Minimum. However, it is still not fully understood and the implications for magnetism are unclear.
  • #1
Shellsunde
7
0
Sun now has only a south magnetic pole??!

This article in the popular press ["Strange Doings on the Sun", Wall Street Journal] mentions that the sun's regular oscillation in the location of its magnetic poles is now not synchronized, as it's expected to be. The sun's north magnetic pole has reversed to south but the south pole presently remains a south pole.

What does this mean? What are the consequences and implications of this in understanding magnetism? Whether in an electromagnet or a permanent magnet, isn't it so that we've never observed a magnetic monopole, and, moreover, that it's not decided whether monopoles can exist? Yet now the sun is a monopole? I regret I don't know enough to ask a more penetrating question, but isn't this noteworthy?
 
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  • #2
It's not that the Sun now has only one pole, but during this process of reversal of polarity, both the North and South poles are temporarily situated close to one another, at least according to this article. As the polarity reversal process takes several days or weeks to complete, it is expected that the two poles will eventually move away from one another.

In a true monopolar object, there is only one pole present, not two different poles in close proximity.
 
  • #3
  • #4
What does this mean? ... I regret I don't know enough to ask a more penetrating question, but isn't this noteworthy?

Noteworthy, I think so, but not historic. It seems the magnetic poles of the sun often reverse during periods of high sunspot activity...and there is quite a bit in historical recordings... meaning a period when the sun is a bit more active and erratic. Some associate periods of low sunspot activity wtih cooler periods on earth, like 'mini ice ages' and the 'dark ages'...a period associated with the 'Maunder minimum'. You can find explanations for those in Wikipedia for example if interested.

There is a brief general discussion here:
http://en.wikipedia.org/wiki/Sun#Magnetic_field

but for a pictorial overview, start at the top of the article and just check out the illustrations to get an idea of the composition of the sun...I think much of it is plasma and so it likely has some charged particles drifting around...that constitutes a varying electric current so you automatically get a varying magnetic field. Earth also has internal currents...and an associated magnetic field... but of course we are a lot cooler and our core less active.
 
  • #5
Little ice age - yes. Dark age? - I think not.
 
  • #6
Dark Ages is an historical period...and I think a reference top an increase in cloud cover and pestilence...when much of the earth, especially Europe, was cooler by about two degrees and widespread famine resulted...
 

1. Why does the Sun now only have a south magnetic pole?

The Sun's magnetic field is caused by the movement of charged particles within its core. As these particles move, they create an electric current which in turn creates a magnetic field. Over time, this magnetic field can weaken and flip, resulting in one dominant pole.

2. How often does the Sun's magnetic field flip?

The Sun's magnetic field flips approximately every 11 years. This is known as the solar cycle and is a natural occurrence in the Sun's magnetic activity. However, the strength and extent of the flip can vary from cycle to cycle.

3. What effects does this magnetic pole flip have on Earth?

The magnetic field of the Sun has a significant impact on Earth and its environment. During a pole flip, the Sun's magnetic field weakens, causing an increase in solar activity such as solar flares and coronal mass ejections. This can lead to disruptions in satellite and communication systems, as well as potential power outages.

4. Is this magnetic pole flip dangerous?

No, the pole flip itself is a natural and normal occurrence in the Sun's magnetic activity. While it can have some effects on Earth, scientists and researchers closely monitor these changes and take necessary precautions to minimize any potential risks.

5. How do scientists know that the Sun's magnetic field has flipped?

Scientists are able to track the Sun's magnetic field through various instruments and observations, such as the Wilcox Solar Observatory's magnetic field data and observations of the Sun's surface. By analyzing these data, scientists can determine when a flip has occurred and monitor its effects on Earth.

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