GoI launches “Seismic Hazard Microzonation” to minimize earthquake disasters
The Ministry of Earth Science has launched Seismic Hazard Microzonation project in major cities of India. The project aims to reduce hazards of seismic activities by putting in adequate measures
What is Seismic Hazard Microzonation?
It is the process of dividing earth quake prone areas based on certain factors. The factors include geological and geophysical characteristics of sites. They are ground shaking, landslide, liquefaction susceptibility, rock fall hazard and flooding caused due to earth quakes. Based on the division, mitigation measures are prepared. Hence, it is a preventive method to minimise the losses.
The factors in the microzonation method are estimated based on response from soil layers.
Microzonation in India
So far, the mapping has been done in the State of Sikkim and in other eight cities. The cities are Delhi, Bengaluru, Kolkata, Guwahati, Jabalpur, Dehra Dun, Ahmedabad and Gandhidham.
Japan is the best example where microzonation techniques are well implemented. The Civil engineering practice in Japan is based on microzonation laws. This helps to design infrastructure with seismic resilience.
The technique gives better mitigatory measures as it helps to understand the impact of seismic activities precisely. In certain places, where no reliable prediction model can be implemented, it is essential to adopt preventive measures.