Narasimman Sundararajan

Dr.

  • 516 Citations
  • 15 h-Index
1982 …2019
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Research Output 1982 2019

  • 516 Citations
  • 15 h-Index
  • 55 Article
  • 4 Chapter
  • 3 Conference contribution
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Article
2019
1 Citation (Scopus)

A comparative study for the source depth estimation of very low frequency electromagnetic (VLF-EM) signals

Ebrahimi, A., Sundararajan, N. & Ramesh Babu, V., Mar 1 2019, In : Journal of Applied Geophysics. 162, p. 174-183 10 p.

Research output: Contribution to journalArticle

very low frequencies
comparative study
electromagnetism
transform
deconvolution
2018

Aspects of U-Th fractionation in Tertiary limestones and calcretes of Dhofar, southern Oman

Pracejus, B., Sundararajan, N., Al-Khirbash, S., Al Hosni, T., Ebrahimi, A., Al-Bulushi, S., Al-Lazki, A. & Al-Maashani, M., Jan 1 2018, (Accepted/In press) In : Chemie der Erde.

Research output: Contribution to journalArticle

Oman
Uranium
Calcium Carbonate
limestone
Fractionation
1 Citation (Scopus)

Geophysical and geochemical investigation for structures favorable to uranium mineralization in Dhofar region, Sultanate of Oman

Sundararajan, N., Pracejus, B., Al- Khirbash, S., Al Hosni, T., Ebrahimi, A., Al- Mashani, M. & Al-Lazki, A., Nov 1 2018, In : Arabian Journal of Geosciences. 11, 22, 700.

Research output: Contribution to journalArticle

uranium
mineralization
fault plane
electromagnetic survey
electromagnetic method

Shear Wave Velocities in the Estimation of Earthquake Hazard Over Alluvium in Seismically Active Region

Sundararajan, N. & Seshunarayana, T., Sep 1 2018, In : Journal of the Geological Society of India. 92, 3, p. 259-264 6 p.

Research output: Contribution to journalArticle

seismic hazard
alluvial deposit
wave velocity
S-wave
surface wave
2016
self potential
artificial neural network
anomaly
polarization
electrical resistivity

Mapping of subsurface fault structures by VLF-EM method in Al Khoud area, Muscat, Sultanate of Oman

Al Bulushi, A. M., Al Wardi, M., Al Shaqsi, B. & Sundararajan, N., May 1 2016, In : Arabian Journal of Geosciences. 9, 5, 349.

Research output: Contribution to journalArticle

electromagnetic method
contour map
2015
2 Citations (Scopus)

Geochemical analysis of groundwater samples in the vicinity of lakes and drainage network

Sankaran, S., Sundararajan, N. & Khadija, S., Oct 1 2015, In : Journal of the Geological Society of India. 86, 4, p. 459-467 9 p.

Research output: Contribution to journalArticle

drainage network
groundwater
lake
seepage
eutrophication

Surface water characteristics in the vicinity of lakes and drainage network

Sundararajan, N., Sankaran, S., Al Hosni, T. K. & Gurunatha Rao, V., Oct 10 2015, In : Environmental Earth Sciences. 74, 7, p. 6077-6096 20 p.

Research output: Contribution to journalArticle

drainage network
biochemical oxygen demand
Surface waters
chemical oxygen demand
Drainage
2014

Hydrogeological investigations in some selected major lakes: A case study

Sanakaran, S. & Sundararajan, N., Oct 24 2014, In : Journal of the Geological Society of India. 84, 4, p. 449-458 10 p.

Research output: Contribution to journalArticle

lake
infiltration
transmissivity
bathymetry
pump
4 Citations (Scopus)

Surface wave studies for shear wave velocity and bedrock depth estimation over basalts

Sundararajan, N. & Seshunarayana, T., 2014, In : Arabian Journal of Geosciences. 7, 9, p. 3791-3799 9 p.

Research output: Contribution to journalArticle

surface wave
wave velocity
S-wave
bedrock
basalt
2013
10 Citations (Scopus)

Seismic microzonation for Muscat region, Sultanate of Oman

El-Hussain, I., Deif, A., Al-Jabri, K., Mohamed, A. M. E., Al-Rawas, G., Toksöz, M. N., Sundararajan, N., El-Hady, S., Al-Hashmi, S., Al-Toubi, K., Al-Saifi, M. & Al-Habsi, Z., Dec 2013, In : Natural Hazards. 69, 3, p. 1919-1950 32 p.

Research output: Contribution to journalArticle

amplification
return period
surface wave
microtremor
ambient noise
2012

Detection of discontinuity in ECG using Wavelet transform

Vasudha, N. & Sundararajan, N., 2012, In : Applied Mathematical Sciences. 6, 117-120, p. 5835-5840 6 p.

Research output: Contribution to journalArticle

Electrocardiography
Wavelet transforms
Wavelet Transform
Discontinuity
Wavelets
1 Citation (Scopus)
surface wave
wave velocity
S-wave
phase velocity
Rayleigh wave
2 Citations (Scopus)

Hartley spectral analysis of self-potential anomalies caused by a 2-D horizontal circular cylinder

Al-Garni, M. A. & Sundararajan, N., Jan 1 2012, In : Arabian Journal of Geosciences. 5, 6, p. 1341-1346 6 p.

Research output: Contribution to journalArticle

self potential
spectral analysis
transform
anomaly
copper
6 Citations (Scopus)
vertical electrical sounding
Silt
Environmental impact assessments
environmental assessment
environmental impact assessment
2011

An alternate and effective approach to Hilbert transform in geophysical applications

Sundararajan, N. & Al-Lazki, A., Oct 2011, In : Computers and Geosciences. 37, 10, p. 1622-1626 5 p.

Research output: Contribution to journalArticle

transform
Gravitation
Magnetite
Ores
Fourier transforms
10 Citations (Scopus)

Detection of basement fractures favourable to uranium mineralization from VLF-EM signals

Sundararajan, N., Ramesh Babu, V. & Chaturvedi, A. K., Jun 2011, In : Journal of Geophysics and Engineering. 8, 2, p. 330-340 11 p.

Research output: Contribution to journalArticle

electromagnetic method
very low frequencies
basements
Uranium
uranium
8 Citations (Scopus)
Shear waves
Liquefaction
hazard assessment
liquefaction
Surface waves
9 Citations (Scopus)

Very-low-frequency electromagnetic (VLF-EM) measurements in the Schirmacheroasen area, East Antarctica

Gnaneshwar, P., Shivaji, A., Srinivas, Y., Jettaiah, P. & Sundararajan, N., Apr 2011, In : Polar Science. 5, 1, p. 11-19 9 p.

Research output: Contribution to journalArticle

Antarctica
anomaly
shears
shear zone
electromagnetic method
2010
16 Citations (Scopus)

Fourier-Hilbert versus Hartley-Hilbert transforms with some geophysical applications

Sundararajan, N. & Srinivas, Y., Aug 2010, In : Journal of Applied Geophysics. 71, 4, p. 157-161 5 p.

Research output: Contribution to journalArticle

transform
Turkey
thin plates
magnetic anomalies
India
2008
5 Citations (Scopus)
gravity anomaly
Gravitation
Subroutines
anticline
Geophysical prospecting
2007
46 Citations (Scopus)

3D gravity inversion of basement relief - A depth-dependent density approach

Chakravarthi, V. & Sundararajan, N., Mar 2007, In : Geophysics. 72, 2

Research output: Contribution to journalArticle

basements
Gravitation
relief
inversions
gravity
22 Citations (Scopus)

An integrated geophysical approach for imaging subbasalt sedimentary basins: Case study of Jam River Basin, India

Chakravarthi, V., Shankar, G. B. K., Muralidharan, D., Harinarayana, T. & Sundararajan, N., Nov 2007, In : Geophysics. 72, 6

Research output: Contribution to journalArticle

river basins
India
Catchments
sedimentary basin
basements
4 Citations (Scopus)

A real spectral analysis of the deformation of a homogenous electric field over a thin bed - A Hartley transform approach

Sundararajan, N., Al-Garni, M. A., Ramabrahmam, G. & Srinivas, Y., Nov 2007, In : Geophysical Prospecting. 55, 6, p. 901-910 10 p.

Research output: Contribution to journalArticle

Spectrum analysis
spectral analysis
spectrum analysis
beds
electric field
2 Citations (Scopus)

INV2P5DSB-A code for gravity inversion of 2.5-D sedimentary basins using depth dependent density

Chakravarthi, V. & Sundararajan, N., May 2007, In : Computers and Geosciences. 33, 4, p. 449-456 8 p.

Research output: Contribution to journalArticle

gravity anomaly
sedimentary basin
Gravitation
gravity
Subroutines
6 Citations (Scopus)

Marquardt optimization of gravity anomalies of anticlinal and synclinal structures with prescribed depth-dependent density

Chakravarthi, V. & Sundararajan, N., Jul 2007, In : Geophysical Prospecting. 55, 4, p. 571-587 17 p.

Research output: Contribution to journalArticle

gravity anomalies
gravity anomaly
Gravitation
anticlines
optimization
22 Citations (Scopus)

Modeling and inversion of magnetic and VLF-EM data with an application to basement fractures: A case study from Raigarh, India

Ramesh Babu, V., Ram, S. & Sundararajan, N., Sep 2007, In : Geophysics. 72, 5

Research output: Contribution to journalArticle

very low frequencies
India
basements
inversions
electromagnetism
19 Citations (Scopus)

VES and VLF - An application to groundwater exploration, Khammam, India

Sundararajan, N., Nandakumar, G., Narsimha, M., Ramam, K. & Srinivas, Y., Jun 2007, In : Leading Edge (Tulsa, OK). 26, 6, p. 708-716 9 p.

Research output: Contribution to journalArticle

groundwater exploration
ground water
India
aquifers
geophysical method
2006
17 Citations (Scopus)

Gravity anomalies of 2.5-D multiple prismatic structures with variable density: A Marquardt Inversion

Chakavarthi, V. & Sundararajan, N., Jan 2006, In : Pure and Applied Geophysics. 163, 1, p. 229-242 14 p.

Research output: Contribution to journalArticle

gravity anomalies
gravity anomaly
Gravitation
inversions
sedimentary basin
1 Citation (Scopus)

Groundwater occurrence in an outlier zone - A case study from Tiruvuru, Krishna district, Andhra Pradesh

Sundararajan, N., Srinivas, Y., Narasimha Chary, M. & Unnikrishnan, K. R., Oct 2006, In : Journal of the Geological Society of India. 68, 4, p. 610-614 5 p.

Research output: Contribution to journalArticle

vertical electrical sounding
outlier
gneiss
biotite
electrical resistivity
9 Citations (Scopus)
Prisms
prisms
attraction
Gravitation
Sediments
25 Citations (Scopus)

VLFPROS-A Matlab code for processing of VLF-EM data

Sundararajan, N., Ramesh Babu, V., Shiva Prasad, N. & Srinivas, Y., Dec 2006, In : Computers and Geosciences. 32, 10, p. 1806-1813 8 p.

Research output: Contribution to journalArticle

electromagnetic method
frequency analysis
Processing
code
2005
4 Citations (Scopus)

A note on the petrophysical properties and geological interpretation in Schirmacher Oasis, east Antarctica

Sundararajan, N. & Madhusudan Rao, B., Apr 2005, In : Journal of the Geological Society of India. 65, 4, p. 497-503 7 p.

Research output: Contribution to journalArticle

oasis
magnetic susceptibility
magnetic anomaly
spectral analysis
transform
11 Citations (Scopus)

Gravity modeling of 21/2-D sedimentary basins - A case of variable density contrast

Chakravarthi, V. & Sundararajan, N., Aug 2005, In : Computers and Geosciences. 31, 7, p. 820-827 8 p.

Research output: Contribution to journalArticle

sedimentary basin
Gravitation
gravity
gravity anomaly
modeling
2 Citations (Scopus)

INVGRAFALT - A Fortran code for Marquardt inversion of gravity anomalies of faulted beds with varying density

Chakravarthi, V. & Sundararajan, N., Dec 2005, In : Computers and Geosciences. 31, 10, p. 1234-1240 7 p.

Research output: Contribution to journalArticle

gravity anomaly
Gravitation
software
code
inversion
2004
17 Citations (Scopus)

Automatic 3-D gravity modeling of sedimentary basins with density contrast varying parabolically with depth

Chakravarthi, V. & Sundararajan, N., Jul 2004, In : Computers and Geosciences. 30, 6, p. 601-607 7 p.

Research output: Contribution to journalArticle

sedimentary basin
gravity field
Gravitation
gravity
modeling
4 Citations (Scopus)
seismic method
seismic refraction
outlier
refraction
gneiss
39 Citations (Scopus)

Ridge-regression algorithm for gravity inversion of fault structures with variable density

Chakravarthi, V. & Sundararajan, N., Nov 2004, In : Geophysics. 69, 6, p. 1394-1404 11 p.

Research output: Contribution to journalArticle

gravity anomalies
ridges
regression analysis
Gravitation
gravity anomaly
2001
groundwater exploration
electrical resistivity
vertical electrical sounding
acid
soil cover
2000

Multidimensional Fourier and Hartley transforms-are they same?

Sundararajan, N. & Vijayachitra, S., May 2000, In : IETE Journal of Research. 46, 3, p. 125-127 3 p.

Research output: Contribution to journalArticle

Fourier transforms
Mathematical transformations
Transform
kernel
Fourier transform
6 Citations (Scopus)

Sundararajan Transform - a tool to interpret potential field anomalies

Sundararajan, N., Srinivas, Y. & Rao, T. L., 2000, In : Exploration Geophysics. 31, 4, p. 622-628 7 p.

Research output: Contribution to journalArticle

gravity anomalies
magnetic anomalies
potential field
potential fields
transform
1998
37 Citations (Scopus)

An analytical method to interpret self-potential anomalies caused by 2-D inclined sheets

Sundararajan, N., Srinivasa Rao, P. & Sunitha, V., Sep 1998, In : Geophysics. 63, 5, p. 1551-1555 5 p.

Research output: Contribution to journalArticle

self potential
analytical method
transform
anomalies
Derivatives
15 Citations (Scopus)

Spectral analysis of gravity anomalies caused by slab-like structures: a Hartley transform technique

Sundararajan, N. & Rama Brahmam, G., May 1998, In : Journal of Applied Geophysics. 39, 1, p. 53-61 9 p.

Research output: Contribution to journalArticle

mid-ocean ridges
gravity anomalies
longitude
gravity anomaly
spectral analysis
1997
19 Citations (Scopus)

Fourier and Hartley transforms - A mathematical twin

Sundararajan, N., Oct 1997, In : Indian Journal of Pure and Applied Mathematics. 28, 10, p. 1361-1365 5 p.

Research output: Contribution to journalArticle

Fourier transforms
Transform
Fourier transform
Orthogonal functions
Digital signal processing
1996
23 Citations (Scopus)

A modified Hilbert transform and its application to self potential interpretation

Sundararajan, N. & Srinivas, Y., Dec 1996, In : Journal of Applied Geophysics. 36, 2-3, p. 137-143 7 p.

Research output: Contribution to journalArticle

self potential
transform
anomalies
Turkey
circular cylinders
1 Citation (Scopus)

Analysis of the deformation of homogeneous electrical fields over some two-dimensional structures

Srinivas, M. & Sundararajan, N., Jul 1996, In : Ground Water. 34, 4, p. 588-592 5 p.

Research output: Contribution to journalArticle

Limestone
Groundwater
analytical method
transform
Minerals
1990
2 Citations (Scopus)

Analysis of magnetic anomalies due to some two-dimensional bodies using the Mellin transform

Mohan, N. L., Babu, L. A., Sunderarajan, N. & Seshagiri Rao, S. V., May 1990, In : Pure and Applied Geophysics. 133, 3, p. 403-428 26 p.

Research output: Contribution to journalArticle

two dimensional bodies
Mellin transforms
magnetic anomalies
Circular cylinders
magnetic anomaly
15 Citations (Scopus)

Use of the Hilbert transform to interpret self-potential anomalies due to two-dimensional inclined sheets

Sundararajan, N., Kumar, I. A., Mohan, N. L. & Seshagiri Rao, S. V., Mar 1990, In : Pure and Applied Geophysics. 133, 1, p. 117-126 10 p.

Research output: Contribution to journalArticle

self potential
Sulfides
transform
Deposits
anomalies
1988

Hilbert analyses of magnetic anomalies due to a vertical fault ( Australia).

Sundararajan, N., Ramoji, K., Mohan, N. L., Balaramudu, A. & Seshagiri Rao, S. V., 1988, In : Acta Geodaetica, Geophysica et Montanistica Hungarica. 23, 2-4, p. 307-318 12 p.

Research output: Contribution to journalArticle

magnetic anomalies
magnetic anomaly
transform
Mathematical transformations
Derivatives
1987
1 Citation (Scopus)

Analysis of gravity gradients over a thin infinite sheet

Sundararajan, N., Kumar, I. A. & Mohan, N. L., Mar 1987, In : Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences. 96, 1, p. 11-14 4 p.

Research output: Contribution to journalArticle

gravity
gravity field
transform
analysis
method