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Very Low Frequency Whistler Mode Wave Events Observed Simultaneously by the Kannuslehto Station and Van Allen Probes
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SYSNO ASEP 0573096 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Very Low Frequency Whistler Mode Wave Events Observed Simultaneously by the Kannuslehto Station and Van Allen Probes Author(s) Bezděková, B. (CZ)
Němec, F. (CZ)
Manninen, J. (FI)
Santolík, Ondřej (UFA-U) RID, ORCID
Hospodarsky, G. B. (US)
Kurth, W. S. (US)Number of authors 6 Article number e2022JA031078 Source Title Journal of Geophysical Research-Space Physics. - : Wiley - ISSN 2169-9380
Roč. 128, č. 1 (2023)Number of pages 12 s. Language eng - English Country US - United States Keywords VLF emissions ; ULF waves ; chorus Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Limited access Institutional support UFA-U - RVO:68378289 UT WOS 000998856700001 EID SCOPUS 85146977876 DOI https://doi.org/10.1029/2022JA031078 Annotation Events characterized by substantial intensity enhancements in the frequency range between about 1.5 and 4 kHz in the measurements of the ground-based Kannuslehto station, Finland are analyzed. Altogether, as many as 465 events are identified in the Kannuslehto data measured during the campaigns between December 2012 and October 2019. It is shown that the events usually last for several hours and they occur preferentially on the dawn side during geomagnetically active periods. Simultaneous measurements performed by the Van Allen Probes spacecraft are used to reveal the L-shells and magnetic local times where a corresponding intensity increase occurs in space. A backward ray tracing analysis is further employed to investigate the wave propagation between the tentative source region and the ground. Wave normal angles of waves eventually detectable at Kannuslehto are determined and compared with those obtained from a detailed wave analysis. Either a wave ducting, propagation in the Earth-ionosphere waveguide, or their combination seem to be needed for the waves to reach Kannuslehto. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2024 Electronic address https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JA031078
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