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A comparative study of Hα-flares of different visual features in relation to radio bursts and sunspots

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Abstract

Solar Hα-flares now reported with their distinctive visual features have been statistically examined for a period of about eight years in relation to their different characteristics, flare-burst and flare-sunspot association. Important results obtained are: (i) Integrated intensity changes from the highest to the lowest values in the order F, H, E, and D flare type, whereas, impulsiveness in the order H, F, E, and D type, (ii) Flare-burst association is frequency dependent and is highest and lowest for H and D types respectively in almost all the frequencies, (iii) Most of the flares of D, E, and F types are associated with sunspots of β p , α p , and δ configurations having field strength 1500–2500 G, while that of H type with β p and β configurations having field strength 1000–2000 G.

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Authors and Affiliations

  1. Centre of Advanced Study in Radio Physics and Electronics, 92, Acharya Prafulla Chandra Road, 700009, Calcutta, India

    M. K. Das Gupta, T. K. Das & S. K. Sarkar

  2. Department of Physics, Calcutta University, 92, Acharya Prafulla Chandra Road, 700009, Calcutta, India

    S. K. Sarkar

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  1. M. K. Das Gupta
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  2. T. K. Das
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  3. S. K. Sarkar
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Das Gupta, M.K., Das, T.K. & Sarkar, S.K. A comparative study of Hα-flares of different visual features in relation to radio bursts and sunspots. Sol Phys 64, 323–328 (1979). https://doi.org/10.1007/BF00151442

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  • DOI: https://doi.org/10.1007/BF00151442

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