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 dec...
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| Format: | Article |
| Language: | English |
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Wiley
2018-12-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2018GL080262 |
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| author | S. Kurita Y. Miyoshi K. Shiokawa N. Higashio T. Mitani T. Takashima A. Matsuoka I. Shinohara C. A. Kletzing J. B. Blake S. G. Claudepierre M. Connors S. Oyama T. Nagatsuma K. Sakaguchi D. Baishev Y. Otsuka |
| author_facet | S. Kurita Y. Miyoshi K. Shiokawa N. Higashio T. Mitani T. Takashima A. Matsuoka I. Shinohara C. A. Kletzing J. B. Blake S. G. Claudepierre M. Connors S. Oyama T. Nagatsuma K. Sakaguchi D. Baishev Y. Otsuka |
| author_sort | S. Kurita |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-b104162a2b064efab6e18c8fb833f595 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b104162a2b064efab6e18c8fb833f5952025-08-20T02:31:37ZengWileyGeophysical Research Letters0094-82761944-80072018-12-01452312,72012,72910.1029/2018GL080262Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground StationsS. Kurita0Y. Miyoshi1K. Shiokawa2N. Higashio3T. Mitani4T. Takashima5A. Matsuoka6I. Shinohara7C. A. Kletzing8J. B. Blake9S. G. Claudepierre10M. Connors11S. Oyama12T. Nagatsuma13K. Sakaguchi14D. Baishev15Y. Otsuka16Insitute for Space‐Earth Environmental Research Nagoya University Nagoya JapanInsitute for Space‐Earth Environmental Research Nagoya University Nagoya JapanInsitute for Space‐Earth Environmental Research Nagoya University Nagoya JapanResearch and Development Directorate Japan Aerospace Exploration Agency Sagamihara JapanInstitute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara JapanInstitute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara JapanInstitute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara JapanInstitute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara JapanDepartment of Physics and Astronomy University of Iowa Iowa City IA USASpace Science Applications Laboratory The Aerospace Corporation Los Angeles CA USASpace Science Applications Laboratory The Aerospace Corporation Los Angeles CA USAObservatories Athabasca University Edmonton Alberta CanadaInsitute for Space‐Earth Environmental Research Nagoya University Nagoya JapanNational Institute of Information and Communications Technology Koganei JapanNational Institute of Information and Communications Technology Koganei JapanSHICRA, Siberian Branch of the Russian Academy of Sciences Yakutsk RussiaInsitute for Space‐Earth Environmental Research Nagoya University Nagoya JapanAbstract 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.https://doi.org/10.1029/2018GL080262radiation beltEMIC wavesPWING projectthe Arase satelliteVan Allen Probesloss |
| spellingShingle | S. Kurita Y. Miyoshi K. Shiokawa N. Higashio T. Mitani T. Takashima A. Matsuoka I. Shinohara C. A. Kletzing J. B. Blake S. G. Claudepierre M. Connors S. Oyama T. Nagatsuma K. Sakaguchi D. Baishev Y. Otsuka Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations Geophysical Research Letters radiation belt EMIC waves PWING project the Arase satellite Van Allen Probes loss |
| 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 |
| title_full | Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations |
| title_fullStr | Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations |
| title_full_unstemmed | Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations |
| title_short | Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations |
| title_sort | rapid loss of relativistic electrons by emic waves in the outer radiation belt observed by arase van allen probes and the pwing ground stations |
| topic | radiation belt EMIC waves PWING project the Arase satellite Van Allen Probes loss |
| url | https://doi.org/10.1029/2018GL080262 |
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