A1 Refereed original research article in a scientific journal
First Type III Solar Radio Bursts of Solar Cycle 25
Authors: Kallunki Juha, McKay Derek, Tornikoski Merja
Publisher: SPRINGER
Publication year: 2021
Journal: Solar Physics
Journal name in source: SOLAR PHYSICS
Journal acronym: SOL PHYS
Article number: ARTN 57
Volume: 296
Issue: 4
First page : 1
Last page: 10
Number of pages: 10
ISSN: 0038-0938
eISSN: 1573-093X
DOI: https://doi.org/10.1007/s11207-021-01790-9
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/56053262
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.
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.
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