Simultaneous observation of whistlers and emissions during a geomagnetically quiet period at low latitude

Details Simultaneous observation of whistlers and emissions during a geomagnetically quiet period at low latitude Simultaneous observation of whistlers and emissions during a geomagnetically quiet period at low latitude

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.331..459s&link_type=abstract

Astrophysics and Space Science, Volume 331, Issue 2, pp.459-468

Astronomy and Astrophysics

Astrophysics

Whistler-Mode Waves, Elf/Vlf Emissions, Magnetospheric Plasma Parameters, Wave-Particle Interactions

Scientific paper

A unique night-time natural electromagnetic disturbances in the VLF/ELF range received during a magnetically quite period at a low latitude Indian ground station, Jammu (geomag. lat. 19°26' N, L=1.17) has been reported. During the routine observation of VLF waves at Jammu, whistlers and different types of VLF/ELF emissions such as whistlers of varying dispersion confined to a small band limited frequency range, hisslers, pulsing hiss, discrete chorus emissions of rising and falling tones with multiple bands, oscillating tone discrete emission, whistler-triggered hook and discrete chorus risers emissions, etc. have been observed simultaneously during the quiet period on a single night. Such type of unique simultaneous observations has never been reported from any of the low latitude ground stations and this is the first observation of its kind. The results are discussed in the light of recorded features of whistlers and emissions. Generation and propagation mechanism are discussed briefly. Plasma parameters are further derived from the dispersion analysis of nighttime whistlers and emissions recorded simultaneously during magnetically quiet periods.

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