If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth? 1. GPS and navigation systems could fail. 2. Tsunamis could occur at equatorial regions. 3. Power grids could be damaged. 4. Intense auroras could occur over much of the Earth. 5. Forest fires could take place over much of the planet. 6. Orbits of the satellites could be disturbed. 7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted. Select the correct answer using the code given below:
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A hard Science & Technology multiple-choice question from UPSC Prelims 2022. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: C. 1, 3, 4, 6 and 7 only
A major solar storm can disrupt GPS/navigation (1), damage power grids (3), produce intense auroras over much of the Earth (4), disturb satellite orbits by heating the upper atmosphere (6) and interrupt shortwave radio for polar-route aircraft (7). Tsunamis (2) and widespread forest fires (5) are not effects of solar storms. So 1, 3, 4, 6 and 7 only — option (c).
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