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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...
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