Home » Zhang et al. 2014

Excitation of EMIC waves detected by the Van Allen Probes on 28 April 2013

Zhang J. -., A. A. Saikin, L. M. Kistler, C. W. Smith, H. E. Spence, C. G. Mouikis, R. B. Torbert, B. A. Larsen, G. D. Reeves, R. M. Skoug, H. O. Funsten, W. S. Kurth, C. A. Kletzing, R. C. Allen, V. K. Jordanova, (2014), Excitation of EMIC waves detected by the Van Allen Probes on 28 April 2013, Geophysical Research Letters, 41, 4101-4108, doi:10.1002/2014GL060621

Abstract

Abstract We report the wave observations, associated plasma measurements, and linear theory testing of electromagnetic ion cyclotron (EMIC) wave events observed by the Van Allen Probes on 28 April 2013. The wave events are detected in their generation regions as three individual events in two consecutive orbits of Van Allen Probe-A, while the other spacecraft, B, does not detect any significant EMIC wave activity during this period. Three overlapping H+ populations are observed around the plasmapause when the waves are excited. The difference between the observational EMIC wave growth parameter (Σh) and the theoretical EMIC instability parameter (Sh) is significantly raised, on average, to 0.10 ± 0.01, 0.15 ± 0.02, and 0.07 ± 0.02 during the three wave events, respectively. On Van Allen Probe-B, this difference never exceeds 0. Compared to linear theory (Σh  Sh), the waves are only excited for elevated thresholds.

Authors (sorted by name)

Funsten Kletzing Kurth Reeves Saikin Smith Spence Torbert Zhang

Journal / Conference

Geophysical Research Letters

Bibtex

@article{doi:10.1002/2014GL060621,
author = {Zhang, J.-C. and Saikin, A. A. and Kistler, L. M. and Smith, C. W. and Spence, H. E. and Mouikis, C. G. and Torbert, R. B. and Larsen, B. A. and Reeves, G. D. and Skoug, R. M. and Funsten, H. O. and Kurth, W. S. and Kletzing, C. A. and Allen, R. C. and Jordanova, V. K.},
title = {Excitation of EMIC waves detected by the Van Allen Probes on 28 April 2013},
journal = {Geophysical Research Letters},
volume = {41},
number = {12},
pages = {4101-4108},
keywords = {EMIC waves, linear theory, ring current, plasmasphere, inner magnetosphere, Van Allen Probes},
doi = {10.1002/2014GL060621},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2014GL060621},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2014GL060621},
abstract = {Abstract We report the wave observations, associated plasma measurements, and linear theory testing of electromagnetic ion cyclotron (EMIC) wave events observed by the Van Allen Probes on 28 April 2013. The wave events are detected in their generation regions as three individual events in two consecutive orbits of Van Allen Probe-A, while the other spacecraft, B, does not detect any significant EMIC wave activity during this period. Three overlapping H+ populations are observed around the plasmapause when the waves are excited. The difference between the observational EMIC wave growth parameter (Σh) and the theoretical EMIC instability parameter (Sh) is significantly raised, on average, to 0.10 ± 0.01, 0.15 ± 0.02, and 0.07 ± 0.02 during the three wave events, respectively. On Van Allen Probe-B, this difference never exceeds 0. Compared to linear theory (Σh  Sh), the waves are only excited for elevated thresholds.},
year = {2014}
}