Earthquake-Resistant Construction
Major M D Apte, Chartered Engineer
It is now an accepted fact that all the countries on the earth are liable to earthquakes. Lands can only be grouped into 5 zones (Zone I where the event is active at its highest to Zone V where it is the least active) depending upon the frequency and the severity of the earthquakes. The severity has an indeterminate character and the entire planet needs be considered as prone to earthquakes. The world has accordingly been mapped in five seismic zones. A map of India indicating various seismic zones is shown for ready reference.