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  • Open Access

Characteristics of discrete VLF falling-tone chorus emissions observed at low latitude ground station Jammu

Earth, Planets and Space200961:BF03352969

https://doi.org/10.1186/BF03352969

Received: 25 May 2009

Accepted: 25 June 2009

Published: 30 November 2009

Abstract

The discrete VLF chorus emissions recorded at low latitude ground station Jammu (geomag. lat. = 22°26′N, L = 1.17) are reported and their characteristics based on spectral analysis have been carried out. These discrete chorus emissions are falling tone emissions which are rarely observed at low latitude ground stations. These discrete chorus emissions are generated during a strong geomagnetic storm period of 2–7 May, 1998. We have computed the frequency sweep rate, repetition period and source region of the individual chorus elements. It is observed that the sweep rate increases with time.

Key words

VLF emissionswhistler-mode wavesgeomagnetic storm

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