Why is gurgaon prone to earthquakes

Coronavirus outbreak Covaxin vaccine Cowin vaccine registration Coronavirus live news Corona cases today Covshield vaccine. Follow us on. Living and entertainment iDiva MensXP. All rights reserved. For reprint rights: Times Syndication Service. Edit Profile. Subscribe Now. Your Subscription Plan Cancel Subscription. Home India News Entertainment. HT Insight. My Account. Sign in.

Chandan Ghosh said that many years ago anti-earthquake construction techniques were not available. Hence these techniques could not be used in the buildings, bridges etc. Retrofitting is recognized by the Bureau of Indian Standards and any civil engineer can apply this technique to a building.

For this, old buildings which are not built on pillars, lanter bands are inserted in the doors and windows above where the roof starts. The corners of the four walls of the building are joined together by a lanter band. The difference is that lanter bands use iron rods, which are much stronger.

Professor Vasant Matsagar of IIT-Delhi says retrofitting is a better method, but it is necessary that retrofitting of old buildings also be done. For this, many measures have been taken in Bhuj. It is generally believed that the buildings standing on the pillar are completely safe. However, if a seismic structure is put in its foundation in a pillar building, then it becomes percent earthquake resistant.

Base isolation techniques are being adopted to make old buildings earthquake resistant in New Zealand. In this, a structure of mantle is erected around the bottom of the foundation of the building, which confines the vibration of the earthquake to the lower part. IIT Jammu professor Chandan Ghosh said that when the earthquake strikes, the biggest danger is to the buildings which are not standing on the pillars.

The building standing on the pillar vibrates simultaneously during the earthquake, while the four walls of the building without pillar move separately, so buildings start falling down. Retrofitting attaches to buildings without pillars to a great extent and the walls do not move separately.

Microzoning has been done in Delhi and the city is divided into nine parts according to the intensity of earthquakes. Among them, three areas, including densely populated Yamunapar, are the most dangerous. Five zones are medium risk, one zone is safe. According to the risk of earthquake, the country is divided into four parts, zone-2, zone-3, zone-4 and zone five.

Of these, the least threatened is Zone 2 and the highest risked is Zone Delhi falls in Zone-4, central India falls under relatively low danger zone of Zone-3, while most of the south falls in Zone-2 with limited danger, but it is a thicker classification. There are some areas in Delhi which can be as dangerous as Zone Thus, there may be many places in the south states which may be hazardous like zone-4 or zone Other Zone-5 may also have some areas where earthquake risk is very low and they are less hazardous like Zone Microzoning means micro classification.

In this, the surface structure of the ground is investigated. Actually, when an earthquake occurs, the future of the house depends to a large extent on the structure of the land as well. For example, if the building is built on a damp surface, ie on the ridge area or on any soil that absorbs water for a long time, then the danger is greater. On the other hand, where the soil is dry or sandy, or the rocks are below, it has different effects during an earthquake. In microzoning, soil samples are collected by drilling into the ground every to meters in the field and after scientific investigation it is decided how sensitive the location is.

The Richter scale is a mathematical measure of earthquake intensity. This is called the Richter Magnitude Test Scale.