Consider the following statements:1. India is one of the highly earthq...
The correct answer is (c) Both 1 and 2.
Statement 1 is correct because India is indeed one of the highly earthquake-affected countries due to the presence of technically active young fold mountains. The Himalayan mountain range, which runs through the northern part of the country, is home to several active fault lines that can produce earthquakes. Additionally, the Western Ghats mountain range in the west and the Eastern Ghats mountain range in the east also have active fault lines that can generate earthquakes.
Statement 2 is also correct because the Bureau of Indian Standards (BIS) has indeed grouped India into four seismic zones based on the intensity of earthquakes that are likely to occur in each zone. These zones are designated as Zone II (low intensity), Zone III (moderate intensity), Zone IV (severe intensity), and Zone V (very severe intensity). The classification is based on the expected ground acceleration due to earthquakes, with higher values corresponding to higher intensity zones.
Consider the following statements:1. India is one of the highly earthq...
Explanation:
India is located in a seismically active region due to the presence of the Himalayan mountain range, which is the result of the collision between the Indian and Eurasian tectonic plates. The tectonic activity in this region makes India prone to earthquakes.
Statement 1:
India is one of the highly earthquake affected countries because of the presence of technically active young fold mountains.
This statement is correct. The Himalayan mountain range is a geologically young and active fold mountain system. The collision between the Indian and Eurasian plates is ongoing, leading to tectonic activity and resulting in frequent earthquakes. The movement of these tectonic plates causes stress and strain to build up, which is eventually released as seismic energy in the form of earthquakes. Therefore, India is highly prone to earthquakes due to the presence of these technically active young fold mountains.
Statement 2:
The Bureau of Indian Standards (BIS) has grouped India into four seismic zones.
This statement is also correct. The Bureau of Indian Standards (BIS) has classified India into four seismic zones based on the level of seismicity and the intensity of earthquakes. These zones are as follows:
1. Zone II: This zone has the least seismic activity, with low-intensity earthquakes.
2. Zone III: This zone has moderate seismic activity, with earthquakes of moderate intensity.
3. Zone IV: This zone has a higher level of seismic activity, with earthquakes of significant intensity.
4. Zone V: This zone is the most seismically active, with the highest intensity earthquakes.
These seismic zones help in determining the level of earthquake-resistant design and construction practices that need to be followed in different parts of the country. It helps in ensuring the safety of structures and reducing the damage caused by earthquakes.
Conclusion:
Both statements 1 and 2 are correct. India is highly prone to earthquakes due to the presence of technically active young fold mountains, and the Bureau of Indian Standards has classified India into four seismic zones based on the level of seismic activity and earthquake intensity.