Skip to main content

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

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.

References

  • Andronov, A. A. and V. Y. Trakhtengerts, Kinetic instability of Earth’s outer radiation belt, Geommagn. Aeron., 4, 233–242, 1964.

    Google Scholar 

  • Bortnik, J., R. M. Thorne, and N. P. Meredith, The unexpected origin of plasmaspheric hiss from discrete chorus emissions, Nature, 452(6), doi:10.1038/nature06741, 2008.

  • Burtis, W. J. and R. A. Helliwell, Magnetospheric Chorus: Occurance pattern and normalized frequency, Planet. Space Sci., 24, 1007–1024, 1976.

    Article  Google Scholar 

  • Cornilleau-Wehrlin, N., F. Gendrin, R. Lefeuvre, M. Parrot, R. Garad, and D. Jones, VLF waves observed on GEOS-I, Space Sci. Rev., 22, 371–382, 1978.

    Google Scholar 

  • Hattori, K. and M. Hayakawa, Consideration of dynamic spectra and direction finding results of hiss triggered chorus emissions, Proc. NIPR Symp., Upper Atmosphere Phys., 7, 40–52, 1994.

    Google Scholar 

  • Hattori, K., M. Hayakawa, D. Lagoutte, M. Parrot, and F. Lefeuvre, Further evidence of triggered chorus emissions from wavelets in the hiss band, Planet. Space Sci., 39, 1465–1472, 1991.

    Article  Google Scholar 

  • Helliwell, R. A., Whistler and Related Ionospheric Phenomena, Stanford Univ. Press, Stanford, USA, 1965.

    Google Scholar 

  • Helliwell, R. A., A theory of discrete emissions from magnetosphere, J. Geophys. Res., 72, 4773–4790, 1967.

    Article  Google Scholar 

  • Karpman, V. I., Non linear effects in the ELF waves propagating along the magnetic field in magnetosphere, Space Sci. Rev., 16, 361–388, 1974.

    Article  Google Scholar 

  • Kennel, C. F. and H. E. Petschek, Limit on stably trapped particle fluxes, J. Geophys. Res., 71, 1–28, 1966.

    Article  Google Scholar 

  • Lauben, D. S., U. S. Inan, T. F. Bell, and D. A. Gurnett, Source characteristic of ELF/VLF chorus, J. Geophys. Res., 107(A12), 1429–1446, 2002.

    Article  Google Scholar 

  • Nunn, D., A self-consistent theory of triggered VLF emissions, Planet. Space Sci., 22, 349–378, 1974.

    Article  Google Scholar 

  • Omura, Y., Y. Katoh, and D. Summers, Theory and simulation of the generation of whistler-mode chorus, J. Geophys. Res., 113, A04223, doi:10.1029/2007JA012622, 2008.

  • Santolik, O., New results of investigations of whistler-mode chorus emissions, Nonlinear Processes Geophys., 15, 621–630, 2008.

    Article  Google Scholar 

  • Santolik, O. and D. A. Gurnett, Transverse dimensions of chorus in the source region, 30, 1031, 2003.

    Google Scholar 

  • Sazhin, S. S. and M. Hayakawa, Magnetospheric chorus emissions: a review, Planet. Space Sci., 40, 681–697, 1992.

    Article  Google Scholar 

  • Singh, A. K. and K. Ronnmark, A generation mechanism for VLF chorus emisions observed at low latitude ground station, Ann. Geophys., 22, 2067–2072, 2004.

    Article  Google Scholar 

  • Singh, A. K. and R. P. Singh, Observations of discrete VLF emissions at low latitudes and their generation mechanism, Earth Planets Space, 56, 1067–1074, 2004.

    Article  Google Scholar 

  • Singh, R. P. and R. P. Patel, Hiss-triggered chorus emissions at Indian stations, J. Atmos. Sol.-Terr. Phys., 66, 1027–1033, 2004.

    Article  Google Scholar 

  • Singh, R., R. P. Patel, R. P. Singh, and Lalmani, An experimental study of hiss triggered chorus emissions at low latitude, Earth Planets Space, 52(1), 37–40, 2000.

    Article  Google Scholar 

  • Singh, S., R. P. Patel, K. K. Singh, A. K. Singh, and R. P. Singh, Role of geomagnetic disturbances on VLF whistler wave activity at low latitudes, Planet. Space Sci., doi.10.1016/pss-2007.02.001, 2007.

    Google Scholar 

  • Smirnova, N. A., A fine structure of the ground observed VHF chorus as an indicator of the wave particle interaction process in the magnetosphere, Planet. Space Sci., 32(4), 425–438, 1984.

    Article  Google Scholar 

  • Smirnova, N. A., P. Yu. Novkov, N. G. Kleimenova, and E. E. Titova, Some spectral peculiarities of VLF emissions registered on the Earth surface near the plasmapause projection, J. Atmos. Terr. Phys., 38, 1247, 1976.

    Article  Google Scholar 

  • Smith, A. J., M. P. Freeman, and G. D. Reeves, Post midnight VLF chorus events, a substorm signature observed at the ground near L = 4, J. Geophys. Res., 101(A11), 24641–24653, 1996.

    Article  Google Scholar 

  • Titova, E. E., B. V. Kozelov, F. Jiricek, A. G. Demekhov, and V. Yu. Traktengerts, Verification of the backward wave oscillator model of VLF chorus generation using data from MAGION 5 satellite, Ann. Geophys., 21, 1–9, 2003.

    Article  Google Scholar 

  • Trakhtengerts, V. Y., Magnetosphere cyclotron maser: Backward wave oscillator generation regime, J. Geophys. Res., 100(A9), 17205–17210, 1995.

    Article  Google Scholar 

  • Trakhtengerts, V. Y., A generation mechanism for chorus emissions, Ann. Geophys., 17, 95–100, 1999.

    Article  Google Scholar 

  • Trakhtengerts, V. Y., A. G. Demekhov, E. E. Titova, B. V. Kozelov, O. Santolik, E. Macusova, D. Gurnett, J. S. Pickett, M. J. Rycroft, and D. Nunn, Formation of VLF chorus frequency spectrum: Cluster data and comparison with the backward wave oscillator model, Geophys. Res. Lett., 34, L02104, doi:10.1029/2006 GL027953, 2007.

  • Tsurutani, B. T. and E. J. Smith, Post midnight chorus: a substorm phenomenon, J. Geophys. Res., 79, 118–127, 1974.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ashutosh K. Singh.

Rights and permissions

Open Access  This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.

Reprints and permissions

About this article

Cite this article

Singh, A.K., Patel, R.P., Singh, R. et al. Characteristics of discrete VLF falling-tone chorus emissions observed at low latitude ground station Jammu. Earth Planet Sp 61, 1179–1183 (2009). https://doi.org/10.1186/BF03352969

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03352969

Key words