Papers presented in National / International Conferences:

Invited Talks:

1. Chandrasekhar, E., 2018, Wavelet and mutifractal analyses of geophysical well-log data, SPG Lecture, delivered at University of Petroleum and Energy Studies (UPES), Dehradun, India on October 01, 2018.
2. Chandrasekhar, E., Gurijala, V. G. and Pandey, S., 2017, Processing of Magnetotelluric Data by Continuous Wavelet Transformation, Invited lecture delivered at the ‘Workshop on Applications of Geophysical Electromagnetics’, held during March 1-2, 2017 at CSIR-NGRI, Hyderabad, India.
3. Chandrasekhar, E., 2016, ‘Characterization of geophysical signals using wavelet analysis’, Invited lecture delivered at the College of Engineering, Department of Electronics and Communication Engineering, SV University, Tirupati, under their Centre of Excellence (CoE) theme: “Atmospheric Remote Sensing and Advanced Signal Processing”, November 14-25, 2016.
4. Chandrasekhar, E., 2016, ‘Characterization of geophysical signals using multifractal analysis’, Invited lecture delivered at the College of Engineering, Department of Electronics and Communication Engineering, SV University, Tirupati, under their Centre of Excellence (CoE) theme: “Atmospheric Remote Sensing and Advanced Signal Processing”, November 14-25, 2016.
5. Chandrasekhar, E., 2016, ‘Characterization of geophysical signals using empirical mode decomposition analysis’, Invited lecture delivered at the College of Engineering, Department of Electronics and Communication Engineering, SV University, Tirupati, under their Centre of Excellence (CoE) theme: “Atmospheric Remote Sensing and Advanced Signal Processing”, November 14-25, 2016.
6. Chandrasekhar, E., 2016. ‘Wavelets and Fractals: A Geosciences Perspective’ A UM-DAE-CBS Colloquium, presented at the University of Mumbai, Kalina campus, Mumbai on October 04, 2016. (PDF of the flyer)
7. Chandrasekhar, E., 2016, ‘The Solar System and the Earth’s Magnetic Field: Relevance to Human Life and Scientific Advances, A Science Popular talk, presented as a mentor at the 12th INSPIRE SCIENCE CAMP 2016, organized during June 02-06, 2016 by Dayand Science College, Latur, Maharashtra, under the aegis of DST, Govt. of India.
8. Chandrasekhar, E., 2015, ‘The Earth’s Magnetic Field: Relevance to Human Life’, A science popular talk, presented as a mentor for ‘INSPIRE Internship Science Camp 2015’, organized by Gurunanak Khalsa College of Arts, Science and Commerce, Mumbai, under the aegis of DST, Govt. of India.
9. Chandrasekhar, E., 2014, Groundwater Assessment Studies using Electrical and Electromagnetic Methods. Presented at the Institute of Seismological Research (ISR), Gandhinagar, Gujarat, on 28-03-2014.
10. Chandrasekhar, E., 2014, Wavelets in Geophysics: A Special reference to Applications in Well-log data Analysis, Magnetotellurics and Geomagnetism, Presented at the Institute of Seismological Research (ISR), Gandhinagar, Gujarat, on 28-03-2014.
11. Chandrasekhar, E., 2013, Geophysical Well-log Data Analysis Using Continuous Wavelet Transform, Presented at the International Conference on Industrial Applications of Signal Processing, held during November 25-27, 2013, at Dr. Daulatrao Aher College of Engineering, Karad, Maharashtra, India.
12. Chandrasekhar, E., 2013, Wavelets in Geosciences – I (Applications in Geomagnetism), Presented at the CEP Course on “WAVELETS” Organized by Department of Electrical Engineering, IIT Bombay for Babasaheb Ambedkar University (BATU) Lonere, Maharashtra, Sponsored by Directorate of Technical Education, MHRD, Govt. of India, August 2, 2013, Mumbai, India.
13. Chandrasekhar, E., 2013, Wavelets in Geosciences – II (Applications in Geophysical Well-logging), Presented at the CEP Course on “WAVELETS”, Organized by Department of Electrical Engineering, IIT Bombay for Babasaheb Ambedkar University (BATU) Lonere, Maharashtra, Sponsored by Directorate of Technical Education, MHRD, Govt. of India, August 2, 2013, Mumbai, India.
14. Chandrasekhar, E., 2012, Processing of Magnetotelluric Data Using MAPROS -A Tutorial, Presented at the 2nd Indo-German Workshop on Electromagnetic Induction in the Earth, November 1-3, 2012, Gandhinagar, India.
15. Chandrasekhar, E., 2012, On the Phase Characteristics of Geomagnetic Jerks –A Wavelet Perspective, Presented at the National Workshop on Wavelets, Multiresolution and Multifractal analyses in Earth, Ocean and Atmospheric Sciences –Current Trends” (WMMFA2012), held during February 29 – March 2, 2012, at IIT, Mumbai, India.
16. Chandrasekhar, E ., 2010, Wavelet Analysis of Geomagnetic Jerks: A Special Reference to Alibag Magnetic Observatory Data, GeoForschungsZentrum (GFZ), Potsdam, Germany.
17. Chandrasekhar, E ., 2004, The role of Oceans in electromagnetic induction at long periods of geomagnetic variations, Monthly seminar at Departamento de Geofisica, Observatorio Nacional, Rio de Janeiro, Brazil.
18. Chandrasekhar, E ., 2000, Geo-electrical structure of the mantle beneath the Indian region derived from 27-day variation and its harmonics, Monthly colloquium at Research Centre for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, Japan.

List of selected papers presented at National and International Conferences:

1. Chandrasekhar, E. and Prabhudesai, S., 2022, Multifractal analysis of ionospheric total electron content (TEC) data, Paper presented at the 33rd IUGG conference on Mathematical Geophysics, held during June 202-24, 2022 (In Online mode), at Seoul National University, Seoul, South Korea (ORAL) (Paper presented by the first author)
2. Shenvi, N., Kumar, A, Chandrasekhar, E. and Virani, H., 2022, Prediction of Ionospheric Total Electron Content Data Using Spatio Temporal Residual Networks, Paper presented at the 33^rd International Conference on Mathematical Geophysics (CMG) of IUGG, held during 20-24 June, 2022 at Seoul, South Korea (ORAL) (Paper presented by the first author)
3. Jayaswal, V., Gairola, G. S. and Chandrasekhar, E., 2019, Determination of frequency attributes of subsurface gas zones: A study using Hilbert-Huang transform, Paper presented at the 20th Annual conference of the International Association of Mathematical Geosciences (IAMG 2019), held during August 10-16, at Penn State University, USA (ORAL) (Paper presented by the first author).  
4. Bharadwaj, S., Chandrasekhar, E. and Gadre, V. M., 2018, Multifractal Studies Using Magnitude Cumulant Analysis of Wavelet Transform: Application to Ionospheric Total Electron Content Data, Paper presented at the 19th Annual conference of the International Association of Mathematical Geosciences (IAMG 2018), held during September 02-08, 2018, at Olomouc, Czech Republic. (ORAL) (Paper presented by the first author). (Nominated for the Best Paper Award)
5. Prabhudesai, S. S., Chandrasekhar, E. and Shenvi, N., 2017, Multifractal analysis of ionospheric total electron content data during different solar activities, Paper presented at the 18th Annual conference of the International Association of Mathematical Geosciences (IAMG 2017), held during September 02-09, 2017, at Perth, Australia. (ORAL) (Paper presented by the second author).
6. Korde, C. G., Chandrasekhar, E. and Shenvi, N., 2017, Multifractal analysis of ionospheric disturbances triggered by earthquakes, Paper presented at the 18th Annual conference of the International Association of Mathematical Geosciences (IAMG 2017), held during September 02-09, 2017, at Perth, Australia. (POSTER) (Paper presented by the second author)
7. Gairola, G. S. and Chandrasekhar, E., 2016, Empirical Mode Decomposition of Geophysical Well-log Data of Bombay Offshore Basin, Mumbai, India, Paper presented at the General Assembly 2016 of the European Geosciences Union (EGU 2016), held during April 17-22, 2016, at Vienna, Austria (ORAL) (Paper presented by the second author).
8. Subhakar, D. and Chandrasekhar, E., 2015, Multifractal Analysis of Geophysical Well log Data, Paper presented at the 17th Annual Conference of the International Association for Mathematical Geosciences, held during September 5-13, 2015, at Freiberg (Saxony), Germany. (ORAL) (Paper presented by the second author).
9. Chandrasekhar, E., Subhakar, D. and Vishnu Vardhan , Y., 2015, Multifractal Analysis of Geomagnetic Storms, Paper presented at the 17th Annual Conference of the International Association for Mathematical Geosciences, held during September 5-13, 2015, at Freiberg (Saxony), Germany. (ORAL) (Paper presented by the first author)
10. E. Chandrasekhar and D. Ramesh, 2014, Identification of saltwater intrusion in coastal aquifers using multi-electrode resistivity imaging technique, Paper presented at the 22nd EM Induction workshop, held during August 24-30, 2014, at Weimar, Germany (Poster) (Paper presented by the first author).
11. Ramesh, D., Chandrasekhar, E. and Biswal, T. K., 2014, Identification of Zones of Saltwater Intrusion in Eastern Ghats Mobile Belt Region Using Multi-electrode Resistivity Imaging Technique, Paper presented at the Golden Jubilee Conference of Indian Geophysical Union, held during January 8-12, 2014 at Hyderabad, India (Poster) (Paper presented by the first author).
12. Nani, E. S., Amol, S. B,. Gururajan, M. P., Mitra, M. and Chandrasekhar, E., 2012, ATG Instabilities: Phase field modelling and its Spectral and Wavelet Implementations, Paper presented at the Fourth International Congress on Computational Mechanics and Simulation (ICCMS 2012), held during December 9-12, 2012 at Hyderabad, India. (Oral) (Paper presented by the third author).
13. Chandrasekhar, E. and Prasad, P., 2012, A Study of Phase Characteristics of Geomagnetic Jerks Using Complex Wavelets. Paper presented at the XV IAGA workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing, held during 4-14 June, 2012, at Cadiz, Spain. (Oral)
14. Gurijala, V. G., Rao, P.B.V.S. and Chandrasekhar, E., 2011, On the Anomalous Nature of Geomagnetic Sq Variations in Andaman & Nicobar Islands, Paper Presented at 48th Annual convention of the IGU, held during 20-22 December, 2011 at Visakhapatnam, Andhra Pradesh, India (Oral) (Paper presented by the second author).
15. Chandrasekhar, E ., Mathew, G. and Harinarayana, T., 2010, Magnetotelluric Investigations in the tectonically active Kachchh region, Bhuj, Gujarat, India, Paper presented at the 20th workshop on EM induction in the Earth, held during September 18-24, 2010, at Giza, Egypt. (Poster).
16. Praveen Kunagu, Vincent Lesur and E. Chandrasekhar, 2010, Source field characterization in view of Electromagnetic induction studies, Paper presented at the European Geosciences Union General Assembly, held during May 2-7, 2010, at Vienna, Austria. (Oral) (Paper presented by the first author).
17. Chandrasekhar, E. and Adhikari, S., 2008, On the Analysis of Geomagnetic Jerks Using Wavelet Transformation, to be presented at the XIII IAGA workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing, to be held during 9-18 June, 2008 at Golden and Boulder, Colorado, USA. (Oral)
18. Praveen Kumar, K.V. and Chandrasekhar, E ., 2008, Electromagnetic Induction Studies by Joint Analysis of Satellite and Ground Magnetic Data, Paper presented at the XIII IAGA workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing, to be held during 9-18 June, 2008 at Golden and Boulder, Colorado, USA. (Poster)
19. Chandrasekhar, E ., Fontes, S.L. and Flexor, J.M., 2008, Magnetotelluric investigations across Senador-Pompean Lineament, Piaui State, NE Brazil, paper presented at the 1st Indo-German Interntional workshop on EM induction studies for Complex geological problems, held during 14-18 March, 2008, at Lonavala, India (Oral).
20. Chandrasekhar, E . and Praveen Kumar, K.V., 2008, Regional Electromagnetic Induction Studies Using Satellite and Ground-based Magnetic Observatory Data, paper presented at the 15th National Space Science Symposium, held during 25–29 February, 2008 at Ooty, India.(Oral). (Paper presented by second author).
21. Choudhury, S., Chandrasekhar, E ., Pandey, V.K. and Prasad, M., 2007, Use of wavelet transformation for geophysical well-log data analysis, Paper No. 29-82704, paper presented at the 15th International conference on Digital Signal Processing (DSP 2007), held during 1-4 July, 2007, at Cardiff, U.K.(Oral).
22. Chandrasekhar, E .., Sergio L. Fontes, Flexor, J.M., Rajaram, M. and Anand, S.P., 2006,, Magnetotelluric and Aeromagnetic Investigations for Assessment of Groundwater Resources in Parnaiba basin, Piaui State of NE Brazil, paper presented at the 18th International workshop on EM induction in the Earth, held during September 17-23, 2006, at El Vendrell, Spain (Poster).
23. Chandrasekhar, E ., Sergio L Fontes and Jean Marie Flexor, 2004, Magnetotelluric Studies for Assessment of Groundwater Resources in Parnaiba Basin in Piaui state of North-East Brazil, Presented at the 17th International workshop on EM induction in the Earth, Hyderabad, India, October 18-23, 2004, (Poster).
24. Chandrasekhar, E . and Sergio L. Fontes, 2004, A study of the ionospheric source current systems of Equinoctial (E-) season over the 1200-1500E longitude region, Presented at the 1st regional symposium of Brazilian Geophysical Society, September 25-29, Sao Paulo, Brazil (Oral).
25. Chandrasekhar, E ., Oshiman, N. and Yumoto, K., 2002, Geomagnetic induction by Sq and the ocean effect along the 2100 Magnetic Meridian region, Presented at the 16th workshop on EM induction in the Earth, Santafe, New Mexico, USA., (June, 2002). (Poster)
26. Chandrasekhar, E ., Oshiman, N. and Yumoto, K., 2001, Upper mantle electromagnetic response to geomagnetic Sq variations and its associated equivalent ionospheric source current systems over the 2100 Magnetic Meridian, Presented at the IAGA-IASPEI joint scientific assembly, Hanoi, Vietnam (August, 2001). (Oral)
27. Chandrasekhar, E ., Oshiman, N. and Yumoto, K., 2001, Geomagnetic induction by Sq along the 2100 Magnetic Meridian, Presented at the spring meeting of Society of Geomagnetism, Earth, Planetary and Space Science (SGEPSS), Tokyo, Japan. (June, 2001). (Oral)
28. Chandrasekhar, E ., 1999, Geo-electrical structure up to lower mantle depths beneath the Indian region, derived from 27-day variation and its harmonics, Presented at the XXII scientific Assembly of IUGG, Birmingham, UK. (July, 1999) (Poster)
29. Chandrasekhar, E . and Arora, B.R., 1996, Electromagnetic response function estimates for the period of 27-day and its harmonics over the Indian region, Presented at the 13th Workshop on EM induction in the Earth, Onuma, Hokkaido, Japan. (August, 1996) (Oral)
30. Chandrasekhar, E . and Alex, S., 1996, On the anomalous features of geomagnetic quiet-day field variations at Nagpur, India, Presented at the 13th Workshop on EM induction in the Earth, Onuma, Hokkaido, Japan. (August, 1996) (Poster)
31. Chandrasekhar, E . and Arora, B.R., 1995, Complex demodulation and electromagnetic response function for geomagnetic field variations at 27-day and its harmonics, Presented at the 20th and 21st annual conventions and seminars on Exploration Geophysics, Association of Exploration Geophysicists (AEG), Bangalore, India. (February, 1995) (Oral)
32. Chandrasekhar, E . and Arora, B.R., 1993, Quantitative estimation of effect of source field geometry on the electromagnetic induction in southern India, Presented at the 7th scientific assembly of IAGA, Buenos, Aires, Argentina. (Oral) (Paper presented by second author)
33. Arora, B.R. and Chandrasekhar, E ., 1993, Observational evidence of the effect of source field geometry on geomagnetic induction in southern India, Presented at the 3rd Intl. Congress of Brazilian Geophys. Soc.
34. Chandrasekhar, E . and Arora, B.R., 1992, Upper mantle electrical conductivity distribution beneath the Indian sub-continent using geomagnetic storm-time variations, Presented at the Sesquicentennial conference of Colaba-Alibag observatories. (Oral)
35. Chandrasekhar, E . and Arora, B.R., 1991, Determination of Deep Earth Electrical Conductivity Using Long-period Geomagnetic Variations, Presented at the First. Intl. Conf. of Assoc. Explr. Geophys, Hyderabad, India. (Poster)

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