Aurora Borealis | एक रहस्यमयी रोशनी |
Channel: सर्वत्र विज्ञान
Date: 2022-12-06

Aurora Borealis | एक रहस्यमयी रोशनी | 

#auroraborealis #auroraaustralis #solarwinds #earth #magneticfield #shorts 


Some increased activity in the solar wind happens during every equinox. These regular fluctuations are known as magnetic storms. Magnetic storms can lead to auroras being seen in the midlatitudes during the time around the spring and autumnal equinoxes. Auroras have been visible as far south as the Yucatan Peninsula in Mexico.

Magnetic storms and active auroras can sometimes interfere with communications. They can disrupt radio and radar signals. Intense magnetic storms can even disable communication satellites.

Coloring an Aurora

The colors of the aurora vary, depending on altitude and the kind of atoms involved. If ions strike oxygen atoms high in the atmosphere, the interaction produces a red glow. This is an unusual aurora—the most familiar display, a green-yellow hue, occurs as ions strike oxygen at lower altitudes. Reddish and bluish light that often appears in the lower fringes of auroras is produced by ions striking atoms of nitrogen. Ions striking hydrogen and helium atoms can produce blue and purple auroras, although our eyes can rarely detect this part of the electromagnetic spectrum.

To find out more about the mysterious light displays, scientists have launched satellites specially designed to study auroras. Until 2005, NASA’s IMAGE (Imager for Magnetopause-to-Aurora Global Exploration) satellite used ultraviolet and radio waves to study auroras and how they are formed.

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