19.6. Earthquake Zoning and Seismic Hazard Maps

Try these first

1. 1.

   What is seismic zoning?

   Hint

   Think about how areas are categorized based on risk.

2. 2.

   What is the highest seismic zone in India?

   Hint

   Look for the zone associated with the highest risks.

3. 3.

   What does seismic zoning aim to achieve?

   • Increase construction costs
   • Classify regions by earthquake risk
   • Encourage building in risky zones

   Hint

   Think about the purpose behind designating different regions for safety.

4. 4.

   True or False: The Indian Seismic Zoning Map is updated regularly.

   • True
   • False

   Hint

   Consider the importance of current data for safety measures.

5. 5.

   Given the historical data of a region where mag. 7 earthquakes occurred every 50 years on average, calculate the expected return period for the next significant quake.

   Hint

   Think about how often large earthquakes have been documented.

6. 6.

   Argue the necessity of having updated seismic zoning maps for urban areas with increasing population density.

   Hint

   Consider the risks associated with negligence in urban planning regarding natural disasters.