India sits on the boundary of two tectonic plates and the consequences for hazard governance are not limited to earthquakes. Discuss.
Subtopic: Geography · Plate Tectonics and India
How to structure your answer
Introduction: The Indian plate, drifting north at about 5 cm per year, collides with the Eurasian plate along the Himalaya and the Indo-Burmese arc.
Body — three dimensions: (1) Direct hazards: earthquakes — Bhuj 2001 (Mw 7.7), Sikkim 2011 (Mw 6.9), Doda 2013, Nepal-Bihar 2015 (Mw 7.8). (2) Coupled hazards: tsunami from the Sumatra-Andaman 2004 quake (Mw 9.1–9.3), landslides in Uttarakhand 2013, glacial lake outburst floods. (3) Long-run consequences: the Himalayas as monsoon barrier and water tower; subduction below Indonesia generating the Ring of Fire phenomena.
Conclusion: Plate tectonics defines India’s natural-hazard map; Seismic Zone IV and V cover a third of the country.
Written within the word limit
127 words · target 150 words · 9 min
Introduction: The Indian plate, drifting north at about 5 cm a year, collides with the Eurasian plate along the Himalaya and the Indo-Burmese arc — a tectonic position that drives more than earthquakes.
Body: Direct seismic hazards include Bhuj (26 January 2001, Mw 7.7), Sikkim (18 September 2011, Mw 6.9) and the Nepal-Bihar earthquake (25 April 2015, Mw 7.8). Coupled hazards extend further — the Sumatra-Andaman quake of 26 December 2004 (Mw 9.1–9.3) generated the Indian Ocean tsunami; the 2013 Uttarakhand floods and recurrent glacial lake outburst floods reflect the same collision tectonics. Long-run consequences include the Himalayas acting as monsoon barrier and water tower, and the Indo-Burmese subduction arc feeding Ring of Fire seismicity that affects the Andaman and Nicobar islands.
Conclusion: Seismic Zones IV and V cover roughly 30 per cent of India — plate tectonics, not policy choice, defines India's natural-hazard map.
What an examiner expects to see
- Indian plate drifting north c. 5 cm/year
- Bhuj earthquake, 26 January 2001, Mw 7.7
- Indian Ocean Tsunami, 26 December 2004, Mw 9.1–9.3
- Sikkim earthquake, 18 September 2011, Mw 6.9
- Nepal-Bihar earthquake, 25 April 2015, Mw 7.8
- Seismic Zones IV and V cover about 30% of India
- Ring of Fire — Pacific plate margins
- Indo-Burmese subduction arc
Concrete cases, schemes and judgments
- Kachchh seismicity, 2001 Bhuj
- Andaman-Nicobar 2004 tsunami impact
- Joshimath subsidence and Himalayan instability
- Sikkim 2011 quake along the Himalayan front