Repeated Type III Burst Groups Associated with a B-Class Flare and a Narrow-Width CME

Silja Pohjolainen*, Derek McKay, Nasrin Talebpour Sheshvan, Christian Monstein

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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We have analysed a solar event from 27 September 2021, which included a small GOES B-class flare, a compact and narrow-width CME, and radio type III bursts that appeared in groups. The long-duration, repeated metric type III burst emission indicates continuous electron acceleration at high altitudes. The flaring active region was surrounded by strong magnetic fields and large-scale loops, which guided the outflow of the CME plasmoid and hence the narrow, bullet-like appearance of the CME. Radio imaging and EUV observations confirmed the direction of particle propagation and the depletion of matter from the solar source region. We observed V-shaped type III burst emission lanes, which also explain the field configuration and suggest a possible location for repeated reconnection that occurred at a constant altitude.

Original languageEnglish
Article number118
JournalSolar Physics
Issue number10
Publication statusPublished - Oct 2023
MoE publication typeA1 Journal article-refereed


  • Association with flares
  • Corona
  • Coronal mass ejections
  • Dynamics
  • Flares
  • Initiation and propagation
  • Magnetic fields
  • Radio bursts


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