Intensity of Earthquake on Richter Scale for Zone V is
- A> 4
- B> 6
- C> 8Correct
- D> 9
Solution
Concept
Common tables link Zone V with earthquakes of Richter magnitude about 8 and above.
Step-by-step solution
1. Common exam tables give a rough Richter magnitude range for each zone. 2. Zone II about below 5, Zone III about 6, Zone IV about 7, Zone V about 8 and above. 3. So for Zone V the magnitude is > 8. 4. The answer is (C).
Explanation
Zone V is the highest seismic zone in India. Many exam tables link it with very strong earthquakes of magnitude 8 or more. So the answer is > 8.
Why the other options are wrong
A: > 4 suits low zones. B: > 6 suits medium zones (about Zone III/IV). D: > 9 is too high and is not used for zoning in India.
Shortcut
Zone V means magnitude 8 or more.
Common mistake
Mixing up intensity (MSK scale, IX and above for Zone V) with magnitude (Richter scale).
Correct answer: C) > 8