Articles | Volume 36, issue 3
Ann. Geophys., 36, 915–923, 2018
https://doi.org/10.5194/angeo-36-915-2018
Ann. Geophys., 36, 915–923, 2018
https://doi.org/10.5194/angeo-36-915-2018

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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ED: Publish subject to minor revisions (review by editor) (25 Apr 2018) by Yoshizumi Miyoshi
AR by Jyrki Manninen on behalf of the Authors (14 May 2018)  Author's response    Manuscript
ED: Publish as is (29 May 2018) by Yoshizumi Miyoshi
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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.