Topic: Salient features of world’s physical geography
Q2. What is the solar cycle and how does solar activity vary during it? Explain the geographical significance of enhanced solar activity for the Earth. (10 M)
Difficulty Level: Medium
Reference: IE
Why the question
Sun–Earth interactions with the contemporary relevance of increased solar activity during Solar Cycle 25 and its effects on the Earth.
Key Demand of the question
The solar cycle and the variation of solar activity across its different phases. Thereafter, bring out the geographical significance of enhanced solar activity for the Earth and human systems.
Structure of the Answer:
Introduction
Briefly introduce the Sun as a magnetically dynamic star whose periodic variations influence the near-Earth environment and generate space-weather phenomena.Body
- Solar cycle and variation in activity: Explain the approximately 11-year cycle, indicating how magnetic activity, sunspots, solar flares and coronal mass ejections vary between solar minimum and solar maximum.
- Geographical significance for the Earth: Cover the spatial effects of enhanced solar activity through its interaction with the magnetosphere and ionosphere, including auroral activity and implications for technology-dependent systems.
Conclusion
Conclude by linking increasing dependence on space-based infrastructure with the need for improved space-weather observation and forecasting, including the significance of missions such as Aditya-L1.
