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The tsunami waves were triggered by a massive earthquake
  • a)
    off northern Sumatra
  • b)
    off Thailand
  • c)
    off Andamans islands
  • d)
    off the Nicobar islands
Correct answer is option 'A'. Can you explain this answer?

Malavika Yadav answered
1. off northern Sumatra
Explanation:
The 2004 Indian Ocean tsunami was triggered by a massive undersea earthquake with a magnitude of around 9.1–9.3. The epicenter of the earthquake was located off the coast of northern Sumatra, Indonesia. This earthquake caused the devastating tsunami that affected many countries around the Indian Ocean, including Thailand, India (Andaman and Nicobar Islands), and others.
2. Off Thailand:
  • Thailand was heavily impacted by the tsunami waves, but the earthquake that triggered the tsunami did not originate off the coast of Thailand. The tsunami waves traveled from the epicenter off the coast of northern Sumatra and reached Thailand, causing significant devastation.
3. Off Andaman Islands:
  • The Andaman Islands were also affected by the tsunami, but the earthquake did not originate there. The waves that hit the Andaman Islands were generated by the earthquake off northern Sumatra.
4. Off the Nicobar Islands:
  • Similar to the Andaman Islands, the Nicobar Islands were impacted by the tsunami, but the earthquake's epicenter was not located there. The earthquake's epicenter was closer to northern Sumatra, and the waves propagated toward the Nicobar Islands.
Conclusion:
The epicenter of the earthquake that triggered the tsunami was off northern Sumatra, making Option 1 the correct one. The other locations (Thailand, Andaman Islands, Nicobar Islands) were affected by the tsunami, but the earthquake did not originate there.

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