A multi‐instrument approach to determining the source‐region extent of EEP‐driving EMIC waves

0523263 - ÚFA 2021 RIV US eng J - Journal Article
Hendry, Aaron - Santolík, Ondřej - Miyoshi, Y. - Matsuoka, A. - Rodger, C. J. - Clilverd, M. A. - Kletzing, C. A. - Shoji, M. - Shinohara, I.
A multi‐instrument approach to determining the source‐region extent of EEP‐driving EMIC waves.
Geophysical Research Letters. Roč. 47, č. 7 (2020), č. článku e2019GL086599. ISSN 0094-8276. E-ISSN 1944-8007
R&D Projects: GA ČR(CZ) GA18-05285S
Grant - others:AV ČR(CZ) AP1401; AV ČR(CZ) JSPS-19-05
Program: Akademická prémie - Praemium Academiae; Bilaterální spolupráce
Institutional support: RVO:68378289
Keywords : Gyrofrequency * Magnetosphere * Wave-Particle Interaction
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.720, year: 2020
Method of publishing: Open access
https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2019GL086599

Recent years have seen debate regarding the ability of electromagnetic ion cyclotron (EMIC) waves to drive EEP (Energetic Electron Precipitation) into the Earth's atmosphere. Questions still remain regarding the energies and rates at which these waves are able to interact with electrons. Many studies have attempted to characterise these interactions using simulations, however these are limited by a lack of precise information regarding the spatial scale size of EMIC activity regions. In this study we examine a fortuitous simultaneous observation of EMIC wave activity by the RBSP‐B and Arase satellites in conjunction with ground‐based observations of energetic electron precipitation by a sub‐ionospheric VLF network. We describe a simple method for determining the longitudinal extent of the EMIC source region based on these observations, calculating a width of 0.75 hr MLT and a drift‐rate of 0.67 MLT/hr. We describe how this may be applied to other similar EMIC wave events.
Permanent Link: http://hdl.handle.net/11104/0307635