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Connection between Active region complexity and Solar Flare strength

Published online by Cambridge University Press:  27 November 2018

K. Amareswari
Affiliation:
ISRO Satellite Centre, Bengaluru - 560017, India. email: amareswari3@gmail.com
Sreejith Padinhatteeri
Affiliation:
The Inter-University Centre for Astronomy and Astrophysics, Pune-411 007, India.
K. Sankarasubramanian
Affiliation:
ISRO Satellite Centre, Bengaluru - 560017, India. email: amareswari3@gmail.com
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Abstract

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Hale (1908) discovered the existence of magnetic fields in sunspots, and since then a consensus has been reached that magnetic fields play an important role in various forms of solar activities, such as solar flares . Modified Mount-Wilson scheme is one of the methodology to classify active regions based on their complexity . As per this scheme, sunspots are classified as α, β, γ, and δ with the complexity of the magnetic topology increasing from α to δ. The δ sunspots are known to be highly flare-productive. An existing automated algorithm (SMART-DF) is modified and used to identify δ-spots for the existing full disk SOHO/MDI data. The automatically identified δ-spots is compared with the NOAA-SRS database and found to be reproducing almost all the identified δ-spots. In thisstudy, the connection between formation of δ-spot and flares is also carried out using GOES flare flux and NOAA-SRS sunspot classification.

Keywords

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

References

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