51 earthquakes in and around Delhi in 2020
According to information available on the website of the National Center for Seismology (NCS), a total of 51 small to medium magnitude earthquakes have occurred in Delhi or within a radius of 200 km. Some of these centers were in Delhi, some in Uttarakhand and most in Haryana. This year, a total of three earthquakes of more than 4 magnitude occurred, one on May 29 (magnitude 4.5, center Rohtak), another on July 3 (magnitude 4.7, slightly away from center Gurugram) and the third on December 17 (magnitude 2.2, center Rewari). Was. ) Let’s.
Stress has an obvious effect on the Himalayan crust
More than five and a half million years have passed, but the Indian plate continues to slide. It is moving towards the Asian plate at a speed of 5-6 cm per year. The lower crust of the Himalayas is also under extreme stress. If they find a place to relocate, it will either move or break. The slow release of stress is also attributed to small earthquakes by some experts.
Experts are not ruling out the possibility of a major earthquake
Recurring seismic experts in Delhi-NCR are talking about three possibilities. Although the possibility of a major earthquake has not been ruled out, he said buildings in the Delhi-NCR should start preparing for the quake. Building assessments are very important at this time, so as to minimize the damage of large earthquakes. Earthquakes have been felt more than 20 times in the last six months. According to the Union Ministry of Earth and Science, the tremors were very mild on the Richter scale. However, seismologists are considering this mild earthquake as a risk.
History of earthquakes in Delhi-NCR
Delhi-NCR, located on the interior of the Indian Plateau, has a long history of earthquakes. Although the time, place and intensity of the quake cannot be clearly estimated, it is clear that frequent earthquakes occur in the NCR area, which can cause major earthquakes in the capital.
Dr. Sehra, Director, Wadia Institute, Himalaya Himalayan Geology, Dehradun
What is the situation in Delhi?
According to seismologist Dr. P. Pandey, no predictions can be made about earthquakes. The first is that such small tremors persist for a while and then the condition returns to normal. The second situation is that there are frequent small tremors and then large earthquakes, but in this condition there are usually five to seven small earthquakes followed by large earthquakes. The third situation is that this earthquake coming from Delhi NCR is telling about a big earthquake in a remote area.
A large area of Delhi is prone to earthquakes
The Delhi-NCR earthquake falls in Zone 4. In 2014, the National Center for Seismology (NCS) conducted a micro-zone study of Delhi-NCR. Accordingly, about 30 per cent of the capital is in Zone-5, which is most vulnerable to earthquakes. More preparation should be done in these parts. Older buildings need to be prepared for earthquakes.
These areas of Delhi are more at risk
The weak and fault areas in Delhi-NCR are as follows.
- Delhi-Haridwar Ridge
- Mahendragarh-Dehradun subsurface fault
- Moradabad Fault
- Sohna’s fault
- Grade Boundary Fault
- Delhi-Sargodha Ridge
- Yamuna river line
- Ganga river line
Stress energy is increasing in many areas
Head of the Department of Seismology at IIT Dhanbad P.K. “Low-magnitude tremors are a sign of major earthquakes,” Khan said. “In the last two years, Delhi-NCR has seen 64 earthquakes of magnitude 4 to 4.9 on the Richter scale. At the same time, there have been eight earthquakes of more than five magnitude. “It shows that the ridge is increasing in this area, especially near New Delhi and Kangra.” The Delhi-Haridwar ridge is also moving. There is a movement of 44 mm in the plate every year.
How can Delhi survive a major earthquake?
Kalchand Sai, director of the Wadia Institute, said local officials would have to see to it that the buildings constructed in their area were in accordance with Bureau Indian f Indian Standards standards. He said that if Delhi-NCR is ready for it (earthquake) then both life and property can be saved in case of a major earthquake. In the case of earthquakes, Delhi is only 200 km from the sensitive area of the Himalayas.