Which of the following statements is/are correct regarding the seismicity and zoning of the National Capital Region (NCR)?
1. The Bureau of Indian Standards (BIS) currently categorizes the NCR entirely under Seismic Zone V, the highest risk zone in India.
2. Earthquakes originating within the Aravalli-Delhi Fold Belt are classified as intraplate earthquakes.

Question

Accepted Answer

B) 2 only — Statement 1 is incorrect because Delhi and the NCR are placed in Seismic Zone IV (Severe Intensity Zone), not Zone V (Very Severe). Statement 2 is correct; the Aravalli-Delhi Fold Belt lies within the Indian tectonic plate, meaning earthquakes originating here are intraplate events, as opposed to interplate events at the Himalayan plate boundary.

Magnitude 4.0 Intraplate Earthquake in New Delhi

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