Maintainin
Well-Known Member
- Joined
- 10 Sep 2009
- Messages
- 7,088
Auroral displays are strongest at times of greatest Sunspot activity and resultin magnetic storms, the Auroras result from large-scale electrical discharge processes surroundin the Planet Earth and it is thought by many so-called Scientists that these discharges are powered by the electromotive force created by the interaction between the Solar wind and Earth's magnetic field.The Blue said:
The most common form of an Aurora is Luminous n' Curtainlike in formation extendin east-west and occur in the upper atmosphere of the North Pole as Aurora Borealis/Northen Lights and above the South Pole as Aurora Australis/Southern Lights that are occasionally visible from middle latitudes as dark red glows at times near the Poleward horizon.
...the Aurora Luminosity comes from the Excited/Ionize atoms and molecules, energetic electrons carryin the discharge currents ...these discharge currents are directed towards the Poles by the Earth's magnetic field and collide with and Excite/Ionize upper atmospheric atoms n' molecules.
When questionin the many colors seen one of the most viewed is Green which in effect is a reflection of energized oxygen atoms whereas oxygen molecules tend to glow between Red-Yellow dependin on amount of oxygen present, nitrogen atoms tend to emit a Purple ray whilst nitrogen molecules display a Pinkish ray.
The overall foldin effect comes from the electric field thats induced on either side of the Aurora Cutain by the electrons, North of the Curtain the field is actually directed Southward ...whilst on the Southside its directed Northward thus this causes the Ionized air on either side to flow rapidly in opposite directions producin whirlwind folds in the Curtain !
So, in the main Auroral activity seems to be controlled by solar activity through the Earth's magnetic field n' the speed of the solar wind, a gusty solar wind generated by solar flares often enhances the Auroral discharge thus causin the 'oval belt' of the Aurora to spread over a larger area.
At times of a decline in sunspot periods a fairly intense Beam of solar winds can blow out from a normally quiet region of the Sun and last from a few months to two years.
Since the Sun rotates in a period of about 27 days, its likewise the Beam also hits the Earth at 27 day intervals causin the 27 day reoccurrence of Auroral activity and it is this that has pronounced seasonal variation reachin a maximum during the months of March n' September the time of the Equinoxes.
During solar flares induced and recurrent geomagnetic storms Auroral activity is not continuous ...instead it repeats a Quasi' cyclic display that last for only a few hours, a typical sub storm begins with a sudden brightenin of an Auroral Curtain in the midnight section, the brighten curtain moves suddenly forward and Auroral activity subsequently spreads Westward and Eastward.
In typical OFF TOPIC mode wot i've wrote aint even the half (yes i see you Mr. LiteYear) ;-)
...whilst it does in the main give part of the math' in regards Aurora Borealis, there are indeed many factors that don't go all the way in explainin the full math' of Aurora Australis/Southern Lights !!!
