(a) the criteria for fixing different zones for evaluating earthquake prone areas;and
(b) the zone in which the areas comprising of Mullaperiyar Dam near to the boundary of
Kerala and Tamil Nadu falls?
(a) the criteria for fixing different zones for evaluating earthquake prone areas;and
(b) the zone in which the areas comprising of Mullaperiyar Dam near to the boundary of
Kerala and Tamil Nadu falls?
MINISTER OF SCIENCE AND TECHNOLOGY AND MINISTER OF EARTH SCIENCES(SHRI KAPIL SIBAL)
a) Bureau of Indian Standards [IS-1893 (Part-1): 2002], based on various scientific inputs, like
History of past earthquakes, tectonic features, lithology etc., from a number of agencies, has
grouped the country into four seismic zones viz. Zone-II, -III. -IV and -V (Enclosurc-l). Of
these, Zone V is the most seismic-ally active region, while zone II is the least. The Modified
Mercalli (MM) intensity (Enclosure-2), which measures the impact of the earthquakes on the surface
of the earth, broadly associated with various zones is as follows:
Seismic Zone Intensity on MM scale II(Low intensity zone) VI (or less) III(Moderate intensity zone) VII IV(Severe intensity zone) VIII V(Very severe intensity zone) IX (and above)