![]() We start with a simple bar magnet, surrounded by iron filings that trace the invisible magnetic field lines of force. Image to left: The Shape of Earths Magnetosphere: This animation depicts how Earths magnetosphere is stretched from a simple, symmetrical dipole field into a windsock-shaped bubble. The suns magnetic field, like that of Earth, has a north and south pole linked by lines of magnetic force. The Earths magnetic field, like that of the sun and some of the other planets, is generated by electrical currents flowing inside them. Likewise, the 6 indicates dawn or morning side of the Earth, while 18 indicates dusk or evening side of the Earth, thus placing the auroras on a 24 hour clock face.Ĭredit: NASA According to scientists, the main cause behind the differences in location appears to be what occurs between the solar wind and Earths magnetic field. The 12 at the top indicates noon (the direction toward the sun), and 0 at the bottom indicates midnight, (the direction away from the sun). Observations were made of the northern (left) and southern (right) hemispheres by IMAGE and Polar satellites, respectively.Īnalysis of the spacecraft images showed how the auroras shift depending on the tilt of the Earths magnetic field toward the sun and conditions in the solar wind. Aurora Borealis 2005 Torrent Trial Physics At. ![]()
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