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The Repetition Period of MeV Electron Microbursts as measured by SAMPEX/HILT
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  • Hamdan Kandar,
  • Lauren W Blum,
  • Mykhaylo Shumko,
  • Lunjin Chen,
  • Jih-Hong Shue
Hamdan Kandar
University of Colorado Boulder

Corresponding Author:[email protected]

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Lauren W Blum
University of Colorado Boulder
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Mykhaylo Shumko
Johns Hopkins University Applied Physics Laboratory
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Lunjin Chen
University of Texas at Dallas
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Jih-Hong Shue
Department of Space Science and Engineering, National Central University
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Here we examine properties of MeV electron microbursts to better understand their generation mechanisms. Using 15 years of data from SAMPEX/HILT, >1MeV microburst repetition periods (time spacing between bursts) are examined and clear dependencies on AE, L shell, and MLT are discovered. Microburst repetition periods are shortest around 0-6 hr MLT and 4-5 Lshell, and grow longer towards the day and afternoon sectors and larger L shells. Shorter repetition periods (<1 sec) are also found to be more common during higher AE, while longer periods (>10 sec) more common during quiet times. The microburst repetition period distributions are compared directly to those of rising tone chorus wave elements and found to be similar in the night, dawn and day MLT sectors, suggesting chorus wave repetition periods are likely directly controlling those of microburst precipitation. However, dusk-side distributions differ, indicating that the dusk-side microbursts properties may be controlled by other processes.
12 Jun 2023Submitted to ESS Open Archive
14 Jun 2023Published in ESS Open Archive