Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/16000
Title: Studies on the schumann resonance frequency variations
Authors: Rai J.
Chand R.
Israil M.
Kamakshi S.
Published in: Proceedings of European Conference on Antennas and Propagation, EuCAP 2009
Abstract: Schumann resonances are the resonant frequencies of electromagnetic radiations from lightning propagating in the earth - ionosphere wave-guide. It is generally around 8 Hz and it's higher harmonics are also present (Sentman, 1987; Roldugin et.al, 2004). The recorded data of Schumann resonances at Dharali in Himalaya at an elevation of 2591 m above sea level were used for the present study. The horizontal electric field components Ex (North-South direction) and Ey, (East-West direction) were obtained by measuring the voltage drop between pairs of non-polarizing electrodes deployed in electrical contact with the soil. Induction Coil magnetometers were used to measure the horizontal Hx and Hy components. A description of the instruments is given by Israil et. al (2008). The measurements were made in frequency range 1 to 30 Hz for the present study, which was sufficient to cover first three resonance modes. It has been found that power spectrum shows maximum during noontime and minimum during nighttime. The frequency shifts in X and Y components of electric and magnetic fields are not in the same phase. Frequency changes in different components vary from 1.9 to 2.6%, 1.8 to 3.2% and 1.4 to 3.3% respectively in first three Schumann resonance modes. Ionospheric anisotropy resulting in the frequency splitting in the X and Y magnetic field components of the Schumann resonance modes were also observed at a spectral resolution of 0.03 Hz.
Citation: Proceedings of European Conference on Antennas and Propagation, EuCAP 2009, (2009), 1437- 1440. Berlin
URI: http://repository.iitr.ac.in/handle/123456789/16000
Issue Date: 2009
Keywords: Electric and magnetic fields
Electrical contacts
Electromagnetic radiation
Frequency changes
Frequency ranges
Frequency shift
Frequency splittings
Higher harmonics
Himalayas
Horizontal electric fields
Induction coils
Magnetic field components
Non-polarizing
Resonance mode
Resonant frequencies
Schumann resonances
Voltage drop
Antennas
Electric fields
Electron optics
Ionosphere
Magnetic fields
Natural frequencies
Oceanography
Polarization
Power spectrum
Magnetic properties
ISBN: 9783000245732
Author Scopus IDs: 7007026359
57197574315
6602682343
36086156800
Author Affiliations: Rai, J., Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Chand, R., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttaranchal, India
Israil, M., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttaranchal, India
Kamakshi, S., Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Corresponding Author: Rai, J.; Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247 667, India; email: jgraifph2003@yahoo.co.in
Appears in Collections:Conference Publications [ES]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.