7/27/2023 0 Comments Earth quake mapThe IS code follows a dual design philosophy: (a) under low probability or extreme earthquake events (MCE) the structure damage should not result in total collapse, and (b) under more frequently occurring earthquake events, the structure should suffer only minor or moderate structural damage. The MSK (Medvedev-Sponheuer-Karnik) intensity broadly associated with the various seismic zones is VI (or less), VII, VIII and IX (and above) for Zones 2, 3, 4 and 5, respectively, corresponding to Maximum Considered Earthquake (MCE). The major activities currently being pursued by the National Center for Seismology include a) earthquake monitoring on a 24/7 basis, including real time seismic monitoring for early warning of tsunamis, b) operation and maintenance of national seismological network and local networks, c) seismological data centre and information services, d) seismic hazard and risk related studies, e) field studies for aftershock/swarm monitoring snf site response studies and f) earthquake processes and modelling. The National Center for Seismology Ministry of Earth Sciences is a nodal agency of the Government of India dealing with various activities in the fields of seismology and allied disciplines. Revised earthquake hazard zone map of India ![]() According to the present zoning map, Zone 5 expects the highest level of seismicity whereas Zone 2 is associated with the lowest level of seismicity. In other words, the earthquake zoning map of India divides India into 4 seismic zones (Zone 2, 3, 4 and 5) unlike its previous version, which consisted of five or six zones for the country. The latest version of seismic zoning map of India given in the earthquake resistant design code of India assigns four levels of seismicity for India in terms of zone factors. A World Bank and United Nations report shows estimates that around 200 million city dwellers in India will be exposed to storms and earthquakes by 2050. Geographical statistics of India show that almost 58% of the land is vulnerable to earthquakes. The major reason for the high frequency and intensity of the earthquakes is that the Indian plate is driving into Asia at a rate of approximately 47 mm/year. ![]() The Indian subcontinent has a history of devastating earthquakes.
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