1. S.N. Bose National Centre for Basic Sciences; Block: JD, Sector III Kolkata 700 098 India
2. Department of Applied Geophysics; Indian School of Mines; Dhanbad 826 004 India
3. Laboratoire de Geologie; Faculté des Sciences; Université de Rouen; Mont Saint Aignam France
4. Bureau d’Etudes ALISE; Saint Jacques-sur-Darnetal France
5. Cairn Energy; Chennai India