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GSI Maps and Earth quake studies
New Delhi: June 18, 2003

The first geological map of India and adjacent countries (on 1 inch=64 miles scale) was published by the Geological Survey of India (GSI) in 1877. Since then, the map has been revised from time to time. The latest Geological Map of India on 1:2 M scale (seventh edition) has been published in 1998. Of the total land area, more than 98 per cent have been mapped on 1:50,000/1:63,360 scales. So far 216 quadrangle geological maps on 1:250,000 scale have been published. More than two lakh sq.km have been covered by multisensor geophysical survey and 1:5 million sq.km covered by aeromagnetic survey. Preliminary survey of 96 per cent of Exclusive Economic Zone (EEZ) of the adjoining oceans has also been completed by the Marine Wing of GSI.

A "Seismotectonic Atlas of India and its Environs" has recently been published in 42 sheets giving a comprehensive geological picture of the whole country in terms of its seismic background and all other relevant details. A Mineral Atlas of India was published recently, which is an asset for the general public, the students, scientists and the industry people. Coming back to the earthquake studies, a broadband observatory has recently been established at Jabalpur which is contributing data to the national network. Installation of another telemetered seismic network at Khandwa, MP is underway. F.D Oldham of GSI is still regarded as one of the pioneering workers on seismology. The monumental treatise based on his work on the famous 1896 Great Assam Earthquake is a master piece on seismic studies.

Press Release by: PIB/DS:RS
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