Earthquakes

An earthquake is a sudden release of stress energy within the Earth's crust along geological fault lines or tectonic boundaries, producing seismic waves that shake the ground.

• Over half of India's geographical area is classified under moderate to severe seismic zones, making earthquake preparedness a critical element of national disaster mitigation.
• The subject spans physical geography in GS Paper 1 and disaster management governance, risk reduction, and resilient infrastructure under GS Paper 3.
• Assessing seismic risk is essential for evaluating urban planning enforcement, non-structural hazard mitigation, and building code compliance across vulnerable regions.

UPSC frames questions on earthquakes by connecting the geophysical mechanics of Himalayan tectonics with administrative challenges in disaster risk reduction. The examination frequently tests candidate knowledge on the National Disaster Management Authority guidelines, retrofitting of critical infrastructure, and gaps in National Building Code enforcement. Analytical questions often require proposed policy measures that combine early warning systems, land-use planning, and community-based emergency response models.

• Geophysical phenomena GS1
• Disaster and disaster management GS3

• Cyclones
• Droughts
• Floods
• Forest Fires
• Landslides