Curriculum Vitae

Kumar  Ramachandran
Assistant Professor of Geosciences
Department of Geosciences
University of Tulsa
Tulsa, Oklahoma 74104, USA

kumar-ramachandran@utulsa.edu

 

Education

Ph.D., Earth Science                             University of Victoria, Canada                          1999-2001

M.Tech., Petroleum Exploration            Indian School Of Mines, India                           1989-1990

M.Sc.Tech., Applied Geophysics          Indian School Of Mines, India                           1982-1985

B.Sc., Physics                                         Madurai Kamaraj University, India                    1977-1980

Ph.D. Dissertation: Velocity structure of S.W.  British Columbia and N.W.  Washington from 3-D non-linear seismic tomography.

Employment

Assistant Professor, University of Tulsa, Tulsa, 2007-Present

Assistant Professor, Queen’s University, Kingston Ontario, Canada, 2005-2007

Visiting Fellow, Geological Survey of Canada, Sidney, Canada, 2003-2005

Post doctoral fellow, University of British Columbia, Vancouver, Canada, 2002-2003

Geophysicist with Oil and Natural Gas Corporation, India from 1985–2002

Scholarships/Fellowships

·        Natural Sciences and Engineering Research Council (NSERC) of Canada Visiting Fellowship   (2003-2005).

·        Sponsorship from employer (Oil & Natural Gas Corporation, Dehradun, India) for M.Tech. program (1989-1990).

·        University Grants Commission (UGC) Scholarship for one year (1984-85) during M.Sc.Tech. program at Indian School of Mines, Dhanbad,  India.

·        Tamil Nadu Industries and Commerce Scholarship for two years (1982-84) during M.Sc.Tech. program at Indian School of Mines, Dhanbad,  India.

Honors

·        Recipient, Dr. Hari Narain Medal from Mining, Geological and Metallurgical Institute of India for best student in geophysics, 1985.

·        Recipient, Indian School of Mines medal for first position in Applied Geophysics, 1985.

Assistant Professor: January, 2007 to present

Department of Geosciences, University of Tulsa,

Tulsa, Oklahoma

 Teaching

 Teaching load  - two courses per term

 Geophysics Undergraduate Program

As I started teaching at the Department of Geosciences, University of Tulsa in  January of 2007, I realized the need to  revamp the curriculum and  make  the under-graduate and graduate geophysics programs to be competitive nationally.

Five main geophysics courses were introduced for the undergraduate geophysics program leading to a B.S. (Geosciences with geophysics option).

            GPHY-2503    Physics of The Earth                                                                

            GPHY-3053    Applied Geophysics                                                                 

            GPHY-4003    Petroleum Seismology                                                              

            GPHY-4023    Field Methods in Geophysics                                                               

            GPHY-4033    Seismic Data Processing and Interpretation

I developed course material for all the new courses and taught them from 2007 to 2009.  The enrolment numbers of under-graduate geophysics students increased from two students   in 2007 to twelve students in 2010.  Students who completed the undergraduate program have successfully joined doctoral  programs  in geophysics at other universities, or started working for  industry.

After a new geophysics faculty was hired in 2010, I started teaching a new geophysics course.

            GPHY-4063    Well Logging For Geologist and Geophysicists 

Course material was developed for this course during Fall, 2010. This course is a part of the new geophysics curriculum.

The number of geophysics undergraduate students has been steadily increasing since 2007. There  are twelve undergraduate geophysics students currently enrolled. In Fall, 2010, it was proposed that the degree offered to geophysics majors be changed from B.S.(Geosciences with geophysics option) to B.S.(Geophysics) and an improved curriculum was presented to the University. This was approved in  Spring, 2011.

 Geophysics - Graduate Program 

In 2007, a new graduate curriculum was developed and was approved by the graduate council. The graduate  program has grown from two students in 2007 to 12 students in 2011. Another five graduate students are expected to enroll in  Fall , 2011.

 Infrastructure Development for Applied Geophysics Program

Since 2007, geophysical equipments have been procured continually to improve the quality of  teaching and research in applied geophysics. An internal proposal for purchase of geophysical equipments was approved  for 322, 000$ in May, 2011. State of the art geophysical equipments are being procured for conducting research in Electromagnetic, Electrical, Seismic, Ground Penetrating Radar studies for teaching and research purpose. These equipments will be used for teaching Applied Geophysics and Field Methods courses and conduct research in near surface mapping for groundwater, environmental, and structure mapping.

Teaching Schedule since 2007  - Class Enrolment 

Graduate Student Supervision

Completed

Erin Lewallen – M.S. Geophysics 2008  (Chevron Corporation, Houston)

Inci Dindar      - M.S. Geophysics 2009  (Turkish Petroleum)

Fiona ChenYao – M.S. Petrophysics - 2009

Francisco Cheng – M.S. Petrophysics – 2009

Muhammed Elsteil – M.S Geophysics  - 2011

Current Students

Ercan Arabaki- M.S. Geophysics 2011-

Taner Arapaci  - M.S. Geophysics 2011-

Tao Zao          - M.S. Geophysics 2011-

Ming Liu – M.S. Geophysics – 2010-

Sema Ozturk  - M.S. Geophysics 2011-

Ali Lahdiri – M.S Geophysics – 2010-

Research

Current research work is focused mainly on three areas.

·        Tomographic imaging of crustal and mantle structure from earthquake and controlled source data.

Research work in this area has resulted in Shear wave velocity models for Northern Cascadia Subduction zone, and Charlevoix Seismic Zone, Canada. Research work from Cascadia subduction zone has been submitted to a Geophysical Journal International  and is under  review.

Ramachandran, K., R. D. Hyndman (2011), The Fate of  Fluids Released From  Subducting Slab in  Northern Cascadia, Submitted to Solida Earth.

A manuscript detailing the  results from Charlevoix seismic zone is under preparation.

Detailed mapping of nearsurface permafrost using 3D seismic Tomography was presented during  SEG conference in 2008.

K. Ramachandran, Tom Brent, Gilles Bellefleur, Scott Dallimore, and Michael Riedel, Imaging permafrost velocity structure using high resolution 3D seismic tomography , SEG Expanded Abstracts 27, 3300 (2008), DOI:10.1190/1.3064030.

A manuscript detailing the final results of the above study is published  in Geophysics journal.

Ramachandran, K., Gilles Bellefleur, Tom Brent, Michael Riedel, Scott Dallimore (2011), Imaging Permafrost Velocity Structure Using High Resolution 3D Seismic Tomography, Geophysics. 

·        Hydrogeophysics studies related to Arbuckle-Simpson Aquifer , Oklahoma

Electrical resistivity tomography and sounding studies conducted in Mill Creek block of Arbuckle Simpson Aquifer has resulted in a preliminary geological model constraining the nature of faults in the region that may confine groundwater flow. The results were presented in Society of Exploration Geophysicists Conference in 2010.

Kumar Ramachandran, Bryan Tapp, Tayler Rigsby, and Erin Lewallen, Characterizing the Arbuckle-Simpson aquifer through electrical methods, Kumar Ramachandran, Bryan Tapp, Tayler Rigsby, and Erin Lewallen, SEG Expanded Abstracts 29, 2014 (2010), DOI:10.1190/1.3513240

A manuscript discussing the final results from the study has been submitted to Geophysics journal and is currently under review.

Ramachandran, K., Bryan Tapp, Tayler Rigsby and Erin Lewallen (2011),  Imaging  of  Fault and Fracture Controls in the Arbuckle-Simpson Aquifer, Southern Oklahoma, USA, Through Electrical Resistivity Sounding and Tomography  Methods, Published in International Journal of Geophysics.

·        Reservoir characterization using well log and seismic data

Integrated studies using seismic and well-log data for reservoir characterization studies are currently in progress. Previous student research in this topic was presented at the SEG conference in 2008.

Francisco Cheng, Kumar Ramachandran, and David Contreras, Comparison of petrophysical rock types from core and well-logs using post-stack 3D seismic data: Field example from Maracaibo-Venezuela, SEG Expanded Abstracts 27, 1595 (2008), DOI:10.1190/1.3059215.

Currently two manuscripts  are under preparation for submission to Journal of  Petroleum and Engineering.

List of Research Proposals Submitted for Funding Request

External

1)      K. Ramachandran, Geophysical Characterization of  Fracture and Fault Controls  in Arbuckle-Simpson Aquifer, NSF (2011), (Not Funded)

2)      K. Ramachandran and Tapp, J. B., Fracture Characterization Through  Deep Electrical Imaging Techniques in Arbuckle-Simpson Aquifer – USGS (2011) (No result)

3)      K. Ramachandran and Tapp, J. B., Mapping Ground Water Table Variations in Arbuckle-Simpson Aquifer, Johnston County, Oklahoma Using ERT and Time-Lapse ERT – USGS (2010) (Not funded)

4)      Chen, J. and Ramachandran, K., Development of a new 3D wave tracing tomography application to Northern Cascadia – NSF (2010)  (Not funded)

5)      Tapp., J.B., and Ramachandran, K., Hydrogeophysical Investigation of the Western Edge of Arbuckle-Simpson Aquifer, NSF (2009), (Not funded)

6)      Ramachandran. K., Shear-wave Seismic Tomography Study of the  Northern Cascadia Subduction Zone  - NSF (2009) (Not funded)

7)      K. Ramachandran and Tapp, J. B., Mapping Ground Water Table Variations in  Arbuckle-Simpson Aquifer, Johnston County, Oklahoma using ERT and Time-lapse ERT  - USGS (2009)  (Not funded)

8)      K. Ramachandran, Potable water in Sierra Leone, SEG (2008) – (Not funded).

9)      Ramachandran, K., Regional Study of Northern Cascadia Subduction Zone Structure  and  Fluid Processes in the Forearc Crust and Mantle -  NSF (2007) (Not funded)

Internal

1)      Special Processing of 3-D Seismic Data for Gas Hydrate Studies, 2007  (Funded) 1 month summer salary + 500 $

2)      Electrical Resistivity Tomography Imaging of Subsurface Faults in Arbuckle-Simpson Aquifer, 2008, (Funded) 1 month summer salary + 500 $

3)      Center for Hydrogeophysics and Geotomography,  2010, (Funded) 322,000$

Assistant Professor: September 2005 -  December, 2006

Department of Geological Sciences and Geological Engineering

Queen’s University, Kingston, Canada

I taught Applied Geophysics at the 3^rd year undergraduate level and at the   graduate level for the  Mineral Exploration program.  I also taught Seismic Methods to 4^th year undergraduates.

Research work on characterizing the northern Cascadia subduction zone and Charlevoix Seismic Zone, Quebec using P- and S-wave tomography studies were initiated.

NSERC Visiting Fellow: August 2003 – August 2005

Pacific Geoscience Centre, Geological Survey of Canada, Sidney, B.C. 

Research work was focused on 3-D mapping of the subsurface velocity structure beneath southwestern British Columbia and northern Washington using controlled source travel-time data and regional and tele-seismic earthquake arrival times.   In the first phase of the study, approximately 600,000 first arrival picks from 240 land stations from the Seismic Hazards Investigation in Puget Sound Experiment conducted in 1998 were inverted for P-wave velocity structure. The velocity model provides the first contiguous, high resolution, upper crustal structure beneath northern Cascadia subduction zone, from the northern end of Georgia basin in British Columbia to the southern tip of Tacoma basin in Washington State. 

Regional earthquakes from S.W. British Columbia and N.W. Washington were employed to image the P-wave velocity structure down to 60 km depth for the same region. The velocity model images the Juan de Fuca slab and forearc mantle structure beneath S.W. British Columbia and N.W. Washington State. Salient points from the interpretation of the velocity model are: 

Post-doctoral Fellow: May 2002 – July 2003

Department of Earth and Ocean Sciences

University of British Columbia, Vancouver B.C.

LITHOPROBE seismic reflection data from Vancouver Island was analyzed to identify the subducting Juan de Fuca plate and the forearc mantle beneath Vancouver Island. The new results from this study extended mapping of the top of the subducting Juan de Fuca crust to eastern Vancouver Island from seismic reflection data.  The top of the plate was identified at eastern Vancouver Island at a depth of approximately 44-47 km, consistent with results from previous receiver function studies. Close to eastern Vancouver Island, the forearc crust-mantle boundary was delineated at ~37 km depth. A previously mapped band of low velocity and high conductivity E-reflection zone  above the subducting Juan de Fuca crust was identified in the present study to be continuous to the eastern edge of Vancouver Island. The study also indicated a possible continuation of the E-reflection zone into the upper mantle beneath mainland British Columbia. In previous studies the E-reflection zone has been interpreted to be either due to inter-layered mafic and/or sedimentary rocks or intensely sheared sediments/dipping lenses of high porosity that trap fluids released from the subducting Juan de Fuca plate. The continuation of these reflectors into the upper mantle may be an indicator of shearing in the upper mantle caused by the subduction thrust.

A second project focused on mapping diamondiferous kimberlite dykes in the Snap Lake region of the Archean Slave geological province of the Northwest Territories, Canada. Data from 2-D seismic lines designed to obtain comparative datasets between different sources (explosives and Vibroseis) and ground types (land and lake-ice) were processed and interpreted. In a previous study, the processing and interpretation of land data from explosive-source had identified a clear image of the thin dyke with high-amplitude reflections mapping the dyke topography to 1300 m depth. My research work included processing and interpretation of the Vibroseis data to identify the location of the kimberlite dyke. The Vibroseis data could detect the dyke when the sources and geophones were on land with nearly equivalent resolution as that of explosive sources. The dyke was not imaged beneath the ice by either explosive or Vibroseis source, most likely due to reverberation and attenuation effects.

Ph.D., Candidate 1999-2001

School of Earth and Ocean Sciences, University of Victoria, Victoria B.C.

This work involved developing and applying a nonlinear seismic tomography algorithm to simultaneously invert controlled source and regional earthquake data to produce a smoothly-varying 3-D model of P-wave velocity structure as well as improved earthquake hypocentral parameters. The algorithm was applied to image the crust and upper-mantle of the Cascadia subduction zone in S.W. British Columbia and N.W. Washington State by inverting controlled-source data (35,000 picks) from the 1999 SHIPS (Seismic Hazard Investigation in Puget Sound) survey and historic earthquake data (16,000 picks from 1400 events from 1984-2000) from the GSC database.  The constructed velocity model was interpreted for regional geology and tectonic structure. The subducting Juan de Fuca crust, oceanic Moho, continental crust and forearc mantle were successfully mapped, and the velocity structure and relocated earthquake hypocenters were correlated with known fault locations to identify active faults.

Oil & Natural Gas Corporation of India, Institute of Petroleum Exploration

Deputy Superintending Geophysicist        1995-98

§         Designed neural network architectures for seismic waveform identification and classification.

§         Conventional seismic data processing  on IBM main frame 

§         Performed regional basin analysis by integrated interpretation of seismic, aeromagnetic, and gravity data in northwestern India.

§         Developed gradient and analytic signal methods to extract attributes from gravity, magnetic and aeromagnetic data; integrated the above data with seismic data for structural interpretation.

Oil & Natural Gas Corporation of India, Institute of Petroleum Exploration

Senior Geophysicist 1990-94     

§         Integrated data interpretation for regional mapping in Ganga basin, Northern India

§         Conventional seismic data processing  on IBM main frame

Oil & Natural Gas Corporation of India  Geophysicist   1985-89

§         Integrated data interpretation for regional mapping in Ganga basin, Northern India

§         Conventional seismic data processing  on IBM main frame

§         Applied efficient and optimal methods for seismic, gravity and magnetic exploration to acquire and map structural and stratigraphic targets.

Publications

Ramachandran, K., R. D. Hyndman (2011), The Fate of  Fluids Released From  Subducting Slab in  Northern Cascadia, Submitted to Solid Earth.

Ramachandran, K., (2011), Regularized Inversion of Controlled Source and Earthquake Data, Journal of Geophysics and Engineering.

Ramachandran, K., Bryan Tapp, Tayler Rigsby and Erin Lewallen (2011),  Imaging  of  Fault and Fracture Controls in the Arbuckle-Simpson Aquifer, Southern Oklahoma, USA, Through Electrical Resistivity Sounding and Tomography  Methods, International Journal of Geophysics.

G. Bellefleur, M. Riedel, J. Huang, T. Saeki, B. Milkereit, K. Ramachandran, and T. Brent (2010), Seismic Characterization of Gas Hydrate Accumulations in Permafrost Environment: Lessons Learned from Mallik, NWT, Canada, Geological Survey of Canada Bulletin.

Ramachandran, K., Gilles Bellefleur, Tom Brent, Michael Riedel, Scott Dallimore (2010), Imaging Permafrost Velocity Structure Using High Resolution 3D Seismic Tomography, Geophysics.

Kumar Ramachandran, Bryan Tapp, Tayler Rigsby, and Erin Lewallen, Characterizing the Arbuckle-Simpson aquifer through electrical methods, (2010), SEG Expanded Abstracts 29, 2014, DOI:10.1190/1.3513240.

Francisco Cheng, Kumar Ramachandran, and David Contreras (2008), Comparison of petrophysical rock types from core and well-logs using post-stack 3D seismic data: Field example from Maracaibo-Venezuela, SEG Expanded Abstracts 27, 1595, DOI:10.1190/1.3059215.

K. Ramachandran, Tom Brent, Gilles Bellefleur, Scott Dallimore, and Michael Riedel (2008), Imaging permafrost velocity structure using high resolution 3D seismic tomography , SEG Expanded Abstracts 27, 3300 (2008), DOI:10.1190/1.3064030.

Ramachandran, K., R. D. Hyndman, and T. M. Brocher (2006), Regional P wave velocity structure of the Northern Cascadia Subduction Zone, J. Geophys. Res., 111, B12301, doi:10.1029/2005JB004108.[18 Citations]

Calvert, A. J., K. Ramachandran, H. Kao, and M. A. Fisher (2006), Local thickening of the Cascadia forearc crust and the origin of seismic reflectors in the uppermost mantle, Tectonophysics, Volume 420, Issues 1-2 , 26 June 2006, Pages 175-188.[11 Citations]

Kao, H., S. Shan, H. Dragert, G. Rogers, J. F. Cassidy, K. Wang, T. S. James, and K. Ramachandran (2006), Spatial-temporal patterns of seismic tremors in northern Cascadia, J. Geophys. Res., 111, B03309, doi:10.1029/2005JB003727.9.[48 Citations]

Ramachandran, K., S. E. Dosso, G. D. Spence, R. D. Hyndman, and T. M. Brocher (2005), Forearc structure beneath southwestern British Columbia: A three-dimensional tomographic velocity model, J. Geophys. Res., 110, B02303, doi:10.1029/2004JB003258.[25 Citations]

Kao, H., S.-Ju. Shan, G. Rogers, H.  Dragert, J. F. Cassidy, and K. Ramachandran  (2005) Depth distribution of seismic tremors along the northern Cascadia margin, Nature, 436, 841-844, doi:10.1038/nature03903.[106 Citations]

Ramachandran, K., S. E. Dosso, C. A. Zelt, G. D. Spence, R. D. Hyndman, and T. M. Brocher (2004), Upper crustal structure of southwestern British Columbia from the 1998 Seismic Hazards Investigation in Puget Sound, J. Geophys. Res., 109, B09303, doi: 10.1029/2003JB002826.[07 Citations] 

Hammer, P. T. C., R. M. Clowes, and K. Ramachandran (2004), High-resolution seismic reflection imaging of a thin diamondiferous kimberlite dyke, Geophysics, 69, 1143–1154, 10.1190/1.1801932.[11 Citations] 

Hammer, P. T. C., R. M. Clowes, and K. Ramachandran (2004), Seismic reflection imaging of thin kimberlite dykes and sills: exploration and deposit characterization of the snap Lake dyke, Canada, Lithos, 76, 359–367.[02 Citation] 

Nedimovic, M. R., R. D. Hyndman, K. Ramachandran, and G. D. Spence (2003), Reflection signature of seismic and aseismic slip on the northern Cascadia subduction interface, Nature, 424, 416–420, doi:10.1038/nature01840.[37 Citations]

Calvert, A. J., M. A. Fisher, K. Ramachandran, and A. M. Tréhu (2003), Possible emplacement of crustal rocks into the forearc mantle of the Cascadia Subduction Zone, Geophys. Res. Lett., 30(23), 2196, doi:10.1029/2003GL018541.[09 Citations]

Manuscripts Under Preparation

Ramachandran, K., R. D. Hyndman, and T. M. Brocher (2011), Regional shear  wave velocity structure of the Northern Cascadia Subduction Zone (Under submission to Journal of Geophysical Research).

Ramachandran, K., Shear wave velocity structure of  Forearc basins in Northern Cascadia, (Under submission to Tectonophysics)

Fiona Chen Yao and  Kumar Ramachandran,  Comparison of Petrophysical properties, and Flow Units using 3D Seismic Data: Field Example from Cerro Negro Field, Venezuela (Under submission to Journal of Petroleum and engineering).

Francisco Cheng, Kumar Ramachandran, and David Contreras,  Classification of  petrophysical rock types through core data,  well-logs and post-stack 3D seismic data: Case Study  from Maracaibo-Venezuela (Under submission to Journal of Petroleum and engineering).

Conference Presentations

Kumar Ramachandran, Bryan Tapp, Tayler Rigsby, and Erin Lewallen (2010), Characterizing the Arbuckle-Simpson aquifer through electrical methods, SEG Annual Meeting, Denver, Colorado.

Gilles Bellefleur,  Michael Riedel, Kumar Ramachandran, Tom Brent and Scott Dallimore (2009), Recent Advances in Mapping Deep Permafrost and Gas Hydrate Occurrences using Industry Seismic Data, Richards Island Area, Northwest Territories, Canada, Frontiers + Innovation –  CSPG CSEG CWLS Convention, Calgary, Alberta, Canada.

K. Ramachandran, Tom Brent, Gilles Bellefleur, Scott Dallimore, and Michael Riedel (2008), Imaging permafrost velocity structure using high resolution 3D seismic tomography, SEG annual Meeting, Las Vegas, Nevada.

Francisco Cheng, Kumar Ramachandran, and David Contreras (2008), Comparison of petrophysical rock types from core and well-logs using post-stack 3D seismic data: Field example from Maracaibo-Venezuela, SEG Annual Meeting, Las Vegas, Nevada.

Gilles Bellefleur, Kumar Ramachandran, Michael Riedel, Tom Brent and Scott Dallimore (2008), Recent advances in mapping permafrost and gas hydrate occurrences using industry seismic data from Mallik, Richards Island, Northwest Territories, Canada, The Ninth International Conference on Permafrost (NICOP), Fairbanks, Alaska.

K. Ramachandran and R.D. Hyndman (2007), Constraints on The Northern Cascadia Subduction Zone Structure From 3D Shear-wave Tomographic Velocities,  Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T11B-0573.

Erin K. Lewallen, Kumar Ramachandran, and  Bryan Tapp (2007), Geophysical Investigation of the Arbuckle-Simpson Aquifer, Oklahoma, to Determine the Influence of Subsurface Structure on Groundwater Flow,  Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS31B-0381.

R.D. Hyndman and K. Ramachandran (2007), Where Does Subducted Water Go? Estimates from Seismic Tomography of Serpentinite in the Forearc Mantle and Quartz in the Deep Crust, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T51B-0548 .

Brocher, T. M., R. J. Blakely, R. A. Wells, B. L. Sherrod, and K. Ramachandran  (2005), The Transition Between N-S and NE-SW Directed Crustal Shortening in the Central and Northern Puget Lowland: New Thoughts on the Southern Whidbey Island Fault, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract S54A-06 INVITED.

Dash, R., G. Spence, R. Hyndman, M. Riedel, K. Ramachandran, and   T. M.  Brocher (2005), Seismic Velocity Structure of the Strait of Georgia, Southwestern British Columbia from First Arrival Seismic Tomography, Canadian Geophysical Union - Annual   Scientific Meeting,  Banff, Canada.

Ramachandran, K., R. D.  Hyndman, and T. M. Brocher (2004), Structure of the Northern Cascadia Subduction Zone: A 3-D Tomographic P-wave Velocity Model, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract S51B-0167.

Ramachandran, K. and R. M. Clowes, (2003), Structure of the Juan de Fuca Plate and Forearc Mantle below Vancouver Island, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract S42A-0151.

Nedimovic, M. R., R. D.  Hyndman, K. Ramachandran, G. D. Spence,  and T. M. Brocher (2003),  Mapping Great Earthquake Rupture Area, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract S42I-02.

Hammer, P. T. C., R. M. Clowes, and K. Ramachandran (2003), High-resolution Seismic Reflection Imaging of Thin, Diamondiferous Kimberlite Dykes, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract S21C-07.

Ramachandran, K., and R. M. Clowes (2003), Structure of the Cascadia subduction zone below Vancouver Island: Juan De Fuca plate and Forearc mantle, Geological Society of America,   Abstracts with Programs, 35(6), Paper No. 127-8, p. 309.

Nedimovic, M. R., R. D. Hyndman, K. Ramachandran, Spence, G. D., and T. M. Brocher (2003), Reflection signature of seismic and aseismic slip on the northern Cascadia subduction thrust, Geological Society of America, Abstracts with Programs, 35(6), Paper No. 127-6, p. 308.

Calvert, A. J., M. A. Fisher, and K. Ramachandran (2003), Deep reflectors and the possible emplacement of crustal rocks into the forearc mantle of the Cascadia subduction zone, Geological Society of America, Abstracts with Programs, 35(6), Paper No. 127-7, p. 309.

Nedimovic, M. R., K. Ramachandran, and R. D. Hyndman (2002), Deep Structure of the Northern Cascadia Subduction Zone From Reflection, Tomography and Seismicity Studies, Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract T51E-05.

Ramachandran, K., and S. E. Dosso (2002), Joint Earthquake/Controlled Source Tomographic Inversion to Image the   Cascadia Subduction Zone, The First International Conference "Inverse Problems: Modeling and Simulation”, Fethiye, Turkey.

Nedimovic, M. R., K. Ramachandran, R. D.  Hyndman, D. Graindorge, and G. D.  Spence (2002), Deep Structure of the Northern Cascadia   Subduction Zone from Multichannel Reflection and Tomography Studies,  Canadian Geophysical Union - Annual   Scientific Meeting,  Banff, Canada.

Ramachandran, K., S. E. Dosso, G. D.  Spence, R. D. Hyndman, T. M. Brocher, and M. M. Fisher (2001), 3-D Velocity Structure of Southwestern British Columbia and Northern Washington, Eos Trans. AGU, 82(47), Fall Meet. Suppl., Abstract S22D-07.

Ramachandran, K., S. E. Dosso, C. A. Zelt, G. D.  Spence, and R. D. Hyndman (2001), 3-D Velocity Structure from Tomographic Inversion of SHIPS Data from Southwestern British Columbia, Seismological Society of America - Annual Meeting.

Ramachandran, K., S. E. Dosso, C. A. Zelt, G. D.  Spence, and R. D. Hyndman (2000), Upper crustal velocity structure of southwestern British Columbia from 3D nonlinear first arrival traveltime tomography, Eos Trans. AGU, 81 (48), Fall Meet. Suppl., Abstract S71D-05.

R. Kumar (1998), Merging aeromagnetic data of adjacent survey blocks in Vindhyan basin, India: A case study, Proceedings of the second conference and exposition on petroleum geophysics, Chennai, India, 1998.

R. Kumar and S. Benjamin (1995), Application of Neural Networks in Geophysics, Proceedings of the 1st International Petroleum Conference and Exhibition, PETROTECH-95, New Delhi,  India.

R. Kumar  and F. Dotiwala (1995), Imaging of Non Imaged data: An application to Aeromagnetic data of North Eastern India, Proceedings of the 1st International Petroleum Conference and Exhibition, PETROTECH-95, New Delhi, India.

Reviewer:

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