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Pulsing VLF Emissions Observed During Daytime at Low Latitude Station Jammu

Atmospheric Research Lab, Department of Physics, Banaras Hindu University, India; Department of Physics, G.G.M. Science College, Jammu, India; Vice-Chancellor, V. K. S. University, Ara, Bihar; Indian Institute of Geomagnetism, New Panvel, Mumbai-410 218, Navi

ABSTRACT The Quasi-periodic pulsing hiss emissions observed during daytime in the frequency range of 50 Hz – 15 kHz at low latitude station Jammu (geomag. Lat. = 22 0 26 / N; L = 1.17) has been reported. It is noted that pulsing VLF emissions is a rare phenomena at low latitudes. The spectrograms clearly show band limited spectrum regularly pulsing with almost equal period of the order of a fraction of a second in the frequency band 2.6 to 6.8 kHz. Generation and propagation mechanism of these emissions are briefly discussed.

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