Zoning for Earthquakes
Earthquakes occur due to movements along faults that have evolved by geological and tectonic procedures. The extent of the impact of an earthquake depends on its magnitude, location and time of occurrence. A macro-level map has been prepared, that divides the country into five zones of several probable maximum intensities on an increasing scale. Zone-I includes which part of the country where seismic risk is minimum and Zone-V covers that portion of the country where seismic risk is the highest. The Bureau of global Standards has published a code namely, IS: 1893 for the earthquake resistance designs of several structures involving structures for power plants. Power supply installations are either located to prevent high seismic zones or designed as per BIS codes. All the buildings and other infrastructures must be designed as per these codes, remaining in view the suitable design margins and factor of safety.