Beautiful aurora and reversing of magnetic pole

There are from washingtonpost.com

all see from alaska

Aurora Australis

continue mutentone.

very beautiful.

btw, what are the spots in the pic?

This one is my favorite it shows a really clear view of Australia and a lovely display.

My best guess is the burning gases of atomic reentry

http://www.nasa.gov/centers/goddard/news/topstory/2005/sept_aurora.html

http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4800

these are just a few of the sources.

joshua AKA "Mutantone"

I remember, we could copy it by Tesla high voltage discharge.

they are also very significant and beautiful. I hvne some photoes to post.

wonderful Nature power! Lightning

Could we human simulate it? yes. I shall post my old collection photo

man made lightning use tesla coil. significant!

Hi cnpower,

Nice pictures ! Here is some detail on one model that has been used to simulate magnetic reversal. I don't think anybody knows for sure how these reversals occur, just that they do. We are living on some sort of bi-stable system. Models I have seen suggest that reversal does not happen instantaneously - over some unknown period, polarity becomes defused into an increasing number of lower strength poles. These increase in activity, swirling around before collapsing back into new but reversed single poles. I will await europiums visit here to learn more - he's sure to find this interesting thread.

Morning, Kris, thank you for your clew.

Im stuck now. what is direction define?

waiting for Eman, he know much more. he certainly come here to put forward his wonderful opinion.

(sometimes his words seems verjuice )

That's a good question. A compass needle presumably has opposite polarity to the Earths field (opposites attract etc), so it's just 'North is not South' and 'South is not North' ! Alternatively maybe it could be related to movement of current within the Earth. I think there are conflicting theories about how the magnetic field is generated. The Sun is even more complex, but reverses polarity with sun-spopt activity. - I didn't notice anything odd in 2001, but I shall try to remember for 2012.

Sciensits said its true the magnetic pole is shifting every time, about 0.001degree(?forget) and ebvery hunreds of thousand years its reversed.

at same time earth itself go away its orbit. and the northern pole star (polaris) shift every year.

so I m stuch what is directin in the unit of thousand year.

Its really interesting, but I dont care about it. because I couldnt help it. I ve do nothing about it

cnpower writes: "at same time earth itself go away its orbit. and the northern pole star (polaris) shift every year."

Yes. Earth spins on its axis but, like a child's toy top, the axis itself is precessing. The axis traces out a complete circle about every 14,000 years.

This has nothing to do with Earth's magnetic field (nor aurorae, consequently), but you're right, Polaris appears to move slightly over the course of each year. In roughly 7,000 years, Polaris will appear to be about 47 degrees south of its current location with respect to the pole. They may need to rename Polaris to something else by that time!

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cnpower writes: "Sciensits said its true the magnetic pole is shifting every time, about 0.001degree(?forget) and ebvery hunreds of thousand years its reversed."

At present the field appears at Earth's surface to be a simple dipole field, more or less. But the mechanisms that produce the field are complex and are not completely understood - nor are they entirely predictable. The field appears to be weakening, and current predictions (depending on whom you talk to) hold that a number of minor poles may surface over the next 50-100 years.

Why? Internally, Earth's magnetic field looks like a ball of spaghetti, with field lines twisting and turning every which way (and far from the simple 'bar-magnet-inside-the-Earth' model they taught you in primary school). Inside the Earth the field is entrained in what is essentially a conductive, liquid plasma. Currents (movement of the fluid, not electrical currents) in the liquid drag the field lines along at different rates, depending on the flow. As the material in which the field lines are entrained is electrically conductive, attempts by the field to resist the flow of material induces electrical currents in the fluid that oppose the attempt. However, the less conductive the material is, the less it opposes motion of the field lines through the liquid and the easier it becomes for the field lines to move with respect to the flow. As the liquid is not homogeneous either in composition nor in flow rate, the entrained field lines become warped and twisted. Eventually the twisted field lines find their way to the surface.

Shown below is a computer model of Earth's present field (not shown is a boundary indicating Earth's surface, but most of the action in this model takes place well within the Earth's interior):

This model simulates current conditions. During a reversal things get a bit more complicated. In the following pic, notice pole pairs emerging from the (again, not pictured) surface at several places:

-e

The blue tangle at the southern hemisphere looks as if it might have one time been connected to the tangle in the western hemisphere

could this be a sign of impact, a sign of change in the sphere, a break in the flow of the lines and what looks to be a reaction on the western side of the sphere.

too deepth for me to understand, but interesting.

besides this, chinese scientista also pay attation to lightning on the field.

more and more younger sholar begin to take these heavy task and work very well.

they trace lightnign, record and study it. I see many beautiful photo took by them.

their main tasks are lead thunder by a small rocket to produce strong current applicated on a wire. observe and research them.

very interesing but dangerous as well

Thank you for your correction.

because there are two angles that hve to measure on survey work.

The sense of direction is a myth. why people has it?
when I was a child, man asked me are you losing your way? I said, no, certainly not. but when they asked me to show them wheer is north. I suddenly went into puzzle. I cannt point it out. then I know they say lost way means dont know direction. Although I can indentfy the marking and how to turn and how to get to your destination.

Some book pointed this is connecting with magnetic field. means your head has a some ferrite substance that can sense magnetic field. some people has more other less. but I seems havent got any direction when I walk. ony by marking and remember.

its interesting.

once they grow up, they will get to use it.

in fact, most of friends of mine dont have direction sense..especially for those who are living in the city. they were guided only by some marking on the way or apparent marks of buildings.

sorry, its me that misunderstand the meaning.

hope you dont mind.

say to dog, I have a funny story which reflect the difference of west and east cultrue.

its back to cool war time. (cold war?)

During the cool war last century, we can see a very popular slogan everwhere in china, either on paper, book or on the wall of building. it was

" Down with U.S. imperialism and their runing dog!"

I dont know if your west scholars were aware of the slogan? pay attation to the running dog translation.

Our chinese call someone who is doing some not good thing following his master as a running dog. its not a good words. but when our translator translate in english, some of your west people feel very odd. they said why you translate in this way? the running dog si so lovely when a little dog run on the road. this made our scholar was " in discomfiture station. they try to change one word, but it spread in our ordinary people.

the story was come from a paper last 80s'

as matter of fact, in some of our countryside, some people name their kids as " little dog", little cat and so on... in the past.

ah, its so long time past, as I speak this story today,

China hs changed very much. from down with usa to go with usa. learn from usa.

from enemy each other to friends each other.

and it was not that long ago that we fought together to save China from a common enemy. the times do change and all I can say is it is wonderful to see China coming to be what it should have been for so long. political change has wrought world wide change I think for the good.

joshua

the curious is when I went to south of china in guangdong district like guanzhou,shenzhen, hongkong etc, I suddenly find all seems reverse as I feeled in my city. this last several days, then I get used to it, but wehn I come back, I get strange my city direction agian. and all seems revers as well. especially when I went out railway station or airport instantly.
But the case hasnt taken place in walking on street in shanghai, hangzhou and even in very north china biggest city, Harbin, where there are lots of western style architactures, like barock, gothic etc very beautiful. it striks me an odd vey much.
it seems my head compass only act in south china.
In fact, many pople in south of china show other only by left, right, or front, bhind etc. direction. not same as our nothern people show others in notht south and east etc.
it seems your britain is also point way in left, right etc. when I learn adn read english articles, I find it. "turn right when you see a cinema, straight on, and then turn right at the conner, behind a tree there is a river, a beautiful lady stood opposite with a book in hand and face to her home town ..."
If our nothern chinese say the words, that will be :" turn east, and straight on when you get to a cinema, then turn north at a corner to a river, there is a beautiful lady with a book in hand, she stood there with fact to east..."
Differnet district, different culture.

Has anyone opened the pictures to look at them closely? Especially that one in post number 8? there be dragons in the winds!

could you enlarge and make a marking?

I can see where it might be said there are dragons in flight could almost be photo manipulation but given the source of the picture who knows?

oh, it looks like a dragon dancing.

the left one colored in blue looks very like a snake dancing. what is it? aurora as well?

as stated the source was NASA so the effects shown would be assumed as real not manipulated pixels as I thought it might be.

so it must be the results of the Australian auroras that made the dragons fly, but I can understand that if viewable from another location there might be seen; the dragons dancing.

joshua

mentioned nasa, It remind me in my mind, I seem to see the pic before somewhere.

lots of chinese interested in it by the time.

None again enjoy these beautiful, charming photo? and add more best ones?

Great nature.

How much can man simulate them?

Not painting by software, but real scene took by camera. or made a repeat by our human with our wisdom and ability.

enjoy it. not only work all day long staying in your workshop.

as I understand it auroras were recreated via thermonuclear detonations in the atmosphere not exactly Eco friendly way to light the sky's

噢和,

oh. but we can recreat man made lightning by high voltage coil discharg.

lightning and the auroras are different events so yes you can recreat lightning and in exterem circumstances an aurora as well.

thread 15 is a sample of manmade lightning.

and there are lots of these samples.