Pulsing VLF Emissions Observed During Daytime at Low Latitude Station Jammu

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. = 220 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. 1