Radio Signatures of Sunspot NOAA 12192

• 作者: Juha Kallunki Minttu Uunila
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: SOLAR Activity SOLAR FLARE SOLAR Cycle SOLAR RADIO Burst
• 年，卷（期）: 2014,（4）
• 页码范围: 649-655
• 页数: 7页
• 分类号: P1

摘要

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.