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Radio Signatures of Sunspot NOAA 12192
Metsahovi Radio Observatory, Aalto University, Kylmala, Finland
Metsahovi Radio Observatory, Aalto University, Kylmala, Finland
- 1 Metsahovi Radio Observatory, Aalto University, Kylmala, Finland
- 2 Metsahovi Radio Observatory, Aalto University, Kylmala, Finland
International Journal of Astronomy and Astrophysics·Volume 04 (2014)·Pages 649–655·Published 18 November 2014·DOI10.4236/ijaa.2014.44059
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Abstract
In this paper, we present an overview of radio signatures of sunspot NOAA 12192 measured with various instruments with frequencies of 37 GHz, 11.2 GHz and 200 - 400 MHz at Aalto University Metsahovi Radio Observatory (MRO). The data were observed during October 20 - 29, 2014. In total, 12 solar radio bursts at 11.2 GHz and 8 at 200 - 400 MHz, with varying intensities and properties, were observed. Radio brightening was captured in several solar radio maps. NOAA 12192 is the largest observed sunspot during solar cycle 24. We show that this exceptional radio brightening belongs to the strongest category including less than 5% of radio brightenings ever measured at MRO.
KeywordsSolar ActivitySolar FlareSolar CycleSolar Radio Burst
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