Articles | Volume 36, issue 3
Ann. Geophys., 36, 915–923, 2018
Ann. Geophys., 36, 915–923, 2018

ANGEO Communicates 21 Jun 2018

ANGEO Communicates | 21 Jun 2018

New high-frequency (7–12 kHz) quasi-periodic VLF emissions observed on the ground at L  ∼  5.5

Jyrki Manninen et al.

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Cited articles

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Bespalov, P. A., Parrot, M., and Manninen, J.: Short period VLF emissions as solitary envelope waves in a magnetospheric plasma maser, J. Atmos. Sol.-Terr. Phy., 72, 1275–1281, 2010. 
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Engebretson, M. J., Posch, J. L., Halford, A. J., Shelburne, G. A., Smith, A. J., Spasojevic, M., Inan, U. S., and Arnoldy, R. L.: Latitudinal and seasonal variations of quasiperiodic and periodic VLF emissions in the outer magnetosphere, J. Geophys. Res., 109, A05216,, 2004. 
Short summary
We reveal previously unknown quasi-periodic (QP) VLF emissions at the unusually high-frequency band of ~ 7–11 kHz by applying the digital filtering of strong sferics to the ground-based VLF data recorded at Kannuslehto station (KAN). In one event, the spectral–temporal forms of the emissions looked like a series of giant bullets, with very abrupt cessation. In the second event, the modulation period was about 3 min under the absence of the simultaneous geomagnetic pulsations.