Balaji, S. 
  
ponding of streams in Moyar-Bhavani valley (Valdiya 1998) and thus suggesting the role of Quaternary 
tectonism in South India. All these facts, suggest the region is not stable and getting adjusted at irregular 
intervals through Pleistocene tectonic events. 
7.CONCLUSION 
The region in between Biligirirangan hills and Javadi hills, earth tremors are more frequent and also in and 
around Pondicherry coast and Madras, off the coast, earth tremors are more frequent. These earth tremors 
fall on N-S, NE-SW and NW-SE trending faults/lineaments. Care also should be taken in constructing dams 
and reservoirs and industries in seismic prone regions. Thus, the present study has thrown light on how the 
faults/lineaments played its role in seismic activities.The Remote Sensing brings out clearly the regional 
lineaments/fractures of tectonic and seismic importance A detailed study involving gravity and 
aeromagnetic methods are suggested to find out the extension of the seismic prone lineaments/faults at 
depth in areas where earth tremors are frequent. 
ACKNOWLEDGEMENT 
The work for this paper was carried out at Centre for Remote Sensing, Bharathidasan University, 
Tiruchirapalli. The first author is thankful to the Chairman, Central Ground Water Board for his permission 
to publish the paper. The same author acknowledges Regional Director, CGWB, Kerala region for his 
encouragement and support. 
REFERENCES 
Anon., 1969. Geology and Minerals of Tamil Nadu and Pondicherry state. Geol.Surv.Ind. (Unpublished 
report) 
Balaji, S., 1995. Structure and Tectonics of Northern Tamil Nadu, India through Remote Sensing. Ph.D 
Thesis submitted to Bharathidasan University, Trichirapalli, (unpublished). 
Grady, J.C., 1971.,Deep main faults of South India. Jour.Geol.Soc. Ind, 12 (1), pp.56-62. 
Rajendran, C.P., and Rajendran, Kusala., 1996. Low moderated seismicity in the vicinity of Palghat gap, 
South India and its implications. Current Science, 70, pp.304-308. 
Ramasamy, SM., and Balaji, S., 1993, Aid of Remote Sensing in Mapping geofractures of environmental 
significance in Tamil Nadu. Ind.Soc.Rem.Sen, 21(3), pp. 109-118. 
Ramasamy, SM., and Balaji,S., 1995., Remote Sensing and Pleistocene tectonics of South India. 
International Journal of Remote Sensing, 16 (13), pp.2375-2391. 
Sharma, H.S.S. and Verghese, T.G., 1979, The role of seismic arrays in continuous monitoring of 
seismicity, Mausam, 2&3, pp. 237-245. 
Singh, H.N., and Venkatesh Raghavan, 1989, A note on the earth terror of 2 September 1988 in 
Trivandrum, Kerala. Jour.Geo.Soc. Ind, 34, pp. 421-423. 
Valdiya, 1998, Late Quaternary movements and landscape rejuvenation in Southeastern Karnataka and 
adjoining Tamil Nadu in Southern Indian Shield. Jour.Geo.Soc.Ind,5,PP.139-166. 
  
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