| Title: |
Conjugate observations of electromagnetic ion cyclotron waves associated with traveling convection vortex events ; Journal of Geophysical Research-Space Physics |
| Authors: |
Kim, Hyomin; Clauer, C. Robert; Gerrard, Andrew J.; Engebretson, Mark J.; Hartinger, Michael D.; Lessard, Marc R.; Matzka, Juergen; Sibeck, David G.; Singer, Howard J.; Stolle, Claudia; Weimer, Daniel R.; Xu, Zhonghua |
| Contributors: |
Electrical and Computer Engineering; Center for Space Science and Engineering Research (Space@VT) |
| Publication Year: |
2017 |
| Collection: |
VTechWorks (VirginiaTech) |
| Description: |
We report on simultaneous observations of electromagnetic ion cyclotron (EMIC) waves associated with traveling convection vortex (TCV) events caused by transient solar wind dynamic pressure (P-d) impulse events. The Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft located near the magnetopause observed radial fluctuations of the magnetopause, and the GOES spacecraft measured sudden compressions of the magnetosphere in response to sudden increases in Pd. During the transient events, EMIC waves were observed by interhemispheric conjugate ground-based magnetometer arrays as well as the GOES spacecraft. The spectral structures of the waves appear to be well correlated with the fluctuating motion of the magnetopause, showing compression-associated wave generation. In addition, the wave features are remarkably similar in conjugate hemispheres in terms of bandwidth, quasiperiodic wave power modulation, and polarization. Proton precipitation was also observed by the DMSP spacecraft during the wave events, from which the wave source region is estimated to be 72 degrees-74 degrees in magnetic latitude, consistent with the TCV center. The confluence of space-borne and ground instruments including the interhemispheric, high-latitude, fluxgate/induction coil magnetometer array allows us to constrain the EMIC source region while also confirming the relationship between EMIC waves and the TCV current system. ; National Science Foundation (NSF) [AGS-1547252]; NSF [PLR-1543364, PLR-1247975, PLR-1443507, PLR-1341677, PLR-1341493] ; The work at New Jersey Institute of Technology was supported by National Science Foundation (NSF) grant AGS-1547252. The work at Virginia Tech was supported by NSF grant PLR-1543364. The fluxgate magnetometer projects at SPA and AGOs are supported by NSF grants PLR-1247975 and PLR-1443507, respectively, to New Jersey Institute of Technology. The induction coil magnetometer projects at STF, IQA, SPA, and AGOs are supported by NSF grants PLR-1341677 to the ... |
| Document Type: |
article in journal/newspaper; still image |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
http://hdl.handle.net/10919/94343; https://doi.org/10.1002/2017JA024108; 122 |
| DOI: |
10.1002/2017JA024108 |
| Availability: |
http://hdl.handle.net/10919/94343; https://doi.org/10.1002/2017JA024108 |
| Rights: |
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International ; http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Accession Number: |
edsbas.ECD326B5 |
| Database: |
BASE |