Question
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:
Explanation
A strong solar storm can disrupt the ionosphere (breaking GPS, 1), induce currents that damage power grids (3), spark widespread auroras (4), heat and expand the upper atmosphere enough to nudge satellite orbits (6), and disturb polar-route radio communication (7). It does not cause tsunamis (2) or forest fires (5) — those need a physical trigger a solar storm can’t provide at ground level.