%0 Conference Proceedings
%4 sid.inpe.br/mtc-m21c/2018/04.16.13.31
%2 sid.inpe.br/mtc-m21c/2018/04.16.13.31.44
%T Radial diffusion driven by ULF waves during rapid dropout in the outer radiation belt after Coronal Mass Ejection
%D 2018
%A Silva, Ligia Alves da,
%A Alves, Livia Ribeiro,
%A Souza, V. M.,
%A Jauer, Paulo Ricardo,
%A Marchezi, José Paulo,
%A Dal Lago, Alisson,
%A Vieira, Luís Eduardo Antunes,
%A Da Silva, G. B.,
%A Medeiros, C. 1,
%A Rockenbach da Silva, Marlos,
%A Pádua, Marcelo Banik de,
%A Sibeck, D.,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress ligia.silva@inpe.br
%@electronicmailaddress livia.alves@inpe.br
%@electronicmailaddress
%@electronicmailaddress paulo.jauer@inpe.br
%@electronicmailaddress jose.marchezi@inpe.br
%@electronicmailaddress alisson.dallago@inpe.br
%@electronicmailaddress luis.vieira@inpe.br
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress marlos.silva@inpe.br
%@electronicmailaddress marcelo.banik@inpe.br
%B Latin American Conference on Space Geophysics, 11 (COLAGE)
%C Buenos Aires, Argentina
%8 16-20 abr.
%X Rapid decrease of high-energy electron flux in the outer radiation belt is observed after of the Coronal Mass Ejection (CME) reach the Earths magnetosphere on July 19, 2016. The solar wind parameters confirm the strong perturbation on the interplanetary medium, which was followed by excitation of waves over a wide range of frequencies. The Ultra Low Frequency (ULF) waves activity was detected on the ground (CARISMA magnetometer network) and on the magnetosphere (Van Allen Probes fluxgate magnetometers). The Power Spectral Density (PSD) associated with ULF waves was calculated from both ground and in situ instruments during the event. Results show that the ULF waves activity was strong at the beginning of July 20. The efficiency of the ULF wave-particle interaction in the radial diffusion is investigated by means of DLL calculation through the rapid dropout. The CARISMA Network magnetometer spread from L 7 to L 4 in a roughly constant magnetic local time meridian, in such a way that we verify the efficiency of ULF waves-particle interaction as a function of L-shell, besides the geomagnetic activity. Thereby, we investigate the role of ULF radial diffusion to different L* using an empirical model. According to the satellite measurements, compressional and poloidal polarization modes are preferential during this dropout, which may contribute significantly with the loss of particles to outer magnetosphere.
%@language en