First Type III Solar Radio Bursts of Solar Cycle 25

Juha Kallunki*, Derek McKay, Merja Tornikoski

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The minimum of the previous solar cycle, Solar Cycle 24, occurred in December 2019, which also marked the start of the new Solar Cycle 25. The first radio bursts of the new solar cycle were observed in the spring season 2020. In this work we will present three type III solar bursts which were observed in May and June 2020 at radio frequencies between 18 - 90 MHz. There are two radio observatories in Finland that are capable of doing low-frequency solar radio observations: Aalto University Metsahovi Radio Observatory (MRO) and Kilpisjarvi Atmospheric Imaging Receiver Array (KAIRA) of the Sodankyla Geophysical Observatory, University of Oulu. The instruments of the two institutes have different design and characteristics, and they operate in rather different radio interference environments. We will compare simultaneous observations from these two instruments and we will also discuss the properties of these type III solar bursts.

Original languageEnglish
Article number57
Number of pages10
JournalSolar Physics
Volume296
Issue number4
DOIs
Publication statusPublished - Apr 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Corona, radio emission
  • Instrumentation and data management
  • Radio bursts, type III

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