@article{40e17b04a010462a873fdd0e950c83a1,
title = "Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations",
abstract = "There has been increasing evidence for pitch angle scattering of relativistic electrons by electromagnetic ion cyclotron (EMIC) waves. Theoretical studies have predicted that the loss time scale of MeV electrons by EMIC waves can be very fast, suggesting that MeV electron fluxes rapidly decrease in association with the EMIC wave activity. This study reports on a unique event of MeV electron loss induced by EMIC waves based on Arase, Van Allen Probes, and ground-based network observations. Arase observed a signature of MeV electron loss by EMIC waves, and the satellite and ground-based observations constrained spatial-temporal variations of the EMIC wave activity during the loss event. Multisatellite observation of MeV electron fluxes showed that ~2.5-MeV electron fluxes substantially decreased within a few tens of minutes where the EMIC waves were present. The present study provides an observational estimate of the loss time scale of MeV electrons by EMIC waves.",
keywords = "EMIC waves, loss, PWING project, radiation belt, the Arase satellite, Van Allen Probes",
author = "S. Kurita and Y. Miyoshi and K. Shiokawa and N. Higashio and T. Mitani and T. Takashima and A. Matsuoka and I. Shinohara and Kletzing, {C. A.} and Blake, {J. B.} and Claudepierre, {S. G.} and M. Connors and S. Oyama and T. Nagatsuma and K. Sakaguchi and D. Baishev and Y. Otsuka",
note = "Funding Information: Science data of the ERG (Arase) satellite used in this study were obtained from the ERG Science Center operated by ISAS/JAXA and ISEE/Nagoya University (https://ergsc.isee.nagoya-u.ac.jp/index. shtml.en). The XEP (L1c v003) and MGF Level 2 v1.00 data were analyzed to generate the electron flux time series and pitch angle distributions. These data will be publicly available from the ERG Science Center based on a project-agreed schedule. The PWING induction magnetometer and OMTI data are available from the ERG Science Center. The Van Allen Probes EMFISIS and MagEIS data can be available from https://emfisis.physics.uiowa.edu/and https://www.rbsp-ect.lanl.gov/rbsp_ect. php, respectively. This study has been supported by JSPS Grant-in-Aid for Scientific Research (15H05815, 15H05747, 16H06286, and 17H06140). This study has also been supported by JSPS Bilateral Open Partnership Joint Research Projects, and the Ministry of Science and Higher Education of the Russian Federation and the Siberian Branch of the Russian Academy of Sciences (project II.16.2.1, registration number AAAA-A17-117021450059-3) and is partially funded by Russian Foundation for Basic Research (18-45-140037; D. B.). Observations made at Athabasca were facilitated by Canada Foundation for Innovation support for observatories there. Work at The Aerospace Corporation was supported by RBSP-ECT funding provided by JHU/APL contract 967399 under NASA{\textquoteright}s Prime contract NAS5-01072. The database construction for the PWING ground-based instruments is supported by the ERG Science Center (http://ergsc. isee.nagoya-u.ac.jp/) and the IUGONET (Inter-university Upper atmosphere Global Observation NETwork) project (http://www.iugonet.org/). Funding Information: Science data of the ERG (Arase) satellite used in this study were obtained from the ERG Science Center operated by ISAS/JAXA and ISEE/Nagoya University (https://ergsc.isee.nagoya-u.ac.jp/index.shtml.en). The XEP (L1c v003) and MGF Level 2 v1.00 data were analyzed to generate the electron flux time series and pitch angle distributions. These data will be publicly available from the ERG Science Center based on a project-agreed schedule. The PWING induction magnetometer and OMTI data are available from the ERG Science Center. The Van Allen Probes EMFISIS and MagEIS data can be available from https://emfisis.physics.uiowa.edu/and https://www.rbsp-ect.lanl.gov/rbsp_ect.php, respectively. This study has been supported by JSPS Grant-in-Aid for Scientific Research (15H05815, 15H05747, 16H06286, and 17H06140). This study has also been supported by JSPS Bilateral Open Partnership Joint Research Projects, and the Ministry of Science and Higher Education of the Russian Federation and the Siberian Branch of the Russian Academy of Sciences (project II.16.2.1, registration number AAAA-A17-117021450059-3) and is partially funded by Russian Foundation for Basic Research (18-45-140037; D. B.). Observations made at Athabasca were facilitated by Canada Foundation for Innovation support for observatories there. Work at The Aerospace Corporation was supported by RBSP-ECT funding provided by JHU/APL contract 967399 under NASA's Prime contract NAS5-01072. The database construction for the PWING ground-based instruments is supported by the ERG Science Center (http://ergsc.isee.nagoya-u.ac.jp/) and the IUGONET (Inter-university Upper atmosphere Global Observation NETwork) project (http://www.iugonet.org/). Publisher Copyright: {\textcopyright}2018. American Geophysical Union. All Rights Reserved.",
year = "2018",
month = dec,
day = "16",
doi = "10.1029/2018GL080262",
language = "English",
volume = "45",
pages = "12,720--12,729",
number = "23",
}