Relevance: GS-1: Important Geophysical Phenomena such as
earthquakes, tsunamis, Volcanic activity, cyclones etc., geographical features
and their location.
Relevance: GS-3: Disaster Management.
Key Phrases: Earthquake, Fault Lines, Mercalli scale,
Richter scale, Ring of Fire, Proximity, Shallowness of the Earthquake, Focus and
Epicenter, Body Waves, P-Wave, S-Wave, Surface Wave, NDMA Guidelines.