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Field-Aligned Currents and Flow Bursts in the Earth’s Magnetotail
Umeå University, Faculty of Science and Technology, Department of Physics. (Space Physics)
2018 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

We use electric and magnetic field data from MMS spacecraft between 2016 and 2017 tostatistically investigate earthward propagating plasma flow bursts and field-aligned currents(FACs) inside the plasma sheet of the geomagnetic tail. We observe that the occurrence rateof flow burst peaks around the midnight region with decreasing trend towards Earth and theplasma sheet flanks. Further, we distinguish between long and short FACs. Long FACs laston average 6 sec and have a magnitude of 5-20 nA/m 2 . Short FACs last on average 10 timesshorter and have an magnitude of 10-50 nA/m 2 . Both, long and short FACs occur on averageone time per flow burst, on minimum 0 times and on maximum 4 times per flow burst. Intotal, 43 % of the observed FACs are located in a flow burst, 40 % before and 17 % right after aflow burst.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Flow Bursts, Field-Aligned Currents, Dipolarization Fronts
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-148525OAI: oai:DiVA.org:umu-148525DiVA, id: diva2:1214673
Subject / course
Fysik C - Examensarbete
Supervisors
Examiners
Available from: 2018-06-18 Created: 2018-06-07 Last updated: 2018-06-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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Output format
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