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With reference to Geomagnetic Storms, consider the following statements:
  1. It is a major disturbance of Earth's magnetosphere as a result of solar wind variations.
  2. These storms can heat the earth’s ionosphere and disrupts long-range radio communication.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
With reference to Geomagnetic Storms, consider the following statement...
Recently, a Geomagnetic Storm was caused by a solar wind that passed through a gap created in the Earth’s magnetic field.
About Geomagnetic Storms:
  • A geomagnetic storm is a major disturbance of Earth's magnetosphere.
  • These storms result from variations in the solar wind that produces significant changes in the currents, plasmas, and fields in Earth’s magnetosphere.
  • The solar wind conditions that are effective for creating geomagnetic storms are sustained (for several hours) periods of the high-speed solar wind and a southward-directed solar wind magnetic field (opposite the direction of Earth’s field) at the dayside of the magnetosphere.
  • The largest such storms are associated with solar coronal mass ejections (CMEs), where a billion tons or so of plasma from the sun, with its embedded magnetic field, arrives at Earth. 
  • Effects:
  • These storms can heat the ionosphere, causing beautiful auroras on Earth.
  • Because the ionosphere is heated and distorted during storms, long-range radio communication that relies on sub-ionospheric reflection gets affected.
  • Ionospheric expansion due to these storms can increase satellite drag and make their orbits difficult to control.
  • Satellite electronics can be damaged through the build-up and discharge of static-electric charges.
  • It can disrupt global navigation systems.
  • It can create harmful geomagnetic-induced currents (GICs) in the power grid and pipelines.
Hence both statements are correct.
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Community Answer
With reference to Geomagnetic Storms, consider the following statement...
The first statement is correct. A geomagnetic storm is indeed a major disturbance of Earth's magnetosphere caused by variations in the solar wind. The solar wind is a stream of charged particles (mainly protons and electrons) continuously emitted by the Sun.

However, the second statement is incorrect. Geomagnetic storms do not heat the Earth. Instead, they can have various effects on our planet's magnetosphere and the technologies that rely on it, such as power grids, communication systems, and satellite operations. These effects can include fluctuations in the Earth's magnetic field, induced currents in power lines, disruption of satellite signals, and potential damage to electronic equipment.
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With reference to Geomagnetic Storms, consider the following statements: It is a major disturbance of Earths magnetosphere as a result of solar wind variations. These storms can heat the earth’s ionosphere and disrupts long-range radio communication.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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