Geological Survey
of India (GSI) has carried out extensive post damage micro-seismic
surveys of the earthquake affected areas in Gujarat. Some 300
localities spread over an area of 1.2 million Sq.Km. were visited
with the objectives of preparing the isoseismal maps of the
earthquake. A 14 Station Micro Earthquake (MEQ) array was set
up in the area to monitor the after shocks over a period of
3 months. The after shock data, fault plane solutions and iso-seismal
map indicate that the causative plane along which the initial
rupture occurred was a tectonic discontinuity trending N60 degree
E - S60 degree W, following the Aravalli trend.
GSI also carried
out geotechnical investigation for selecting sites for relocation
of some towns like Anjar, Bhachau, Raper of Kutch district.
GSI has suggested active fault mapping and seismic microzonation
of the vulnerable rural and urban areas. All the new structures
in the vulnerable area should adhere to aseismic designs as
per Bureau of Indian Standards (BIS) code. They also create
awareness about earthquake in the general public.
GSI has initiated
bilateral dialogue with expert agencies like Geological Survey
of Japan and United States Geological Survey for possible collaboration
between GSI and these organisations in the field of earthquake
studies.
This information
was given by the Minister for Mines, Shri Ramesh Bais in a written
reply in the Lok Sabha today.
