Korsos, M.B., Georgoulis, M.K., Gyenge, N. et al. (7 more authors) (2020) Solar flare prediction using magnetic field diagnostics above the photosphere. Astrophysical Journal, 896 (2). 119. ISSN 0004-637X
Abstract
In this article, we present the application of the weighted horizontal gradient of magnetic field (WG M ) flare prediction method to three-dimensional (3D) extrapolated magnetic configurations of 13 flaring solar active regions (ARs). The main aim is to identify an optimal height range, if any, in the interface region between the photosphere and lower corona, where the flare onset time prediction capability of WG M is best exploited. The optimal height is where flare prediction, by means of the WG M method, is achieved earlier than at the photospheric level. 3D magnetic structures, based on potential and nonlinear force-free field extrapolations, are constructed to study a vertical range from the photosphere up to the low corona with a 45 km step size. The WG M method is applied as a function of height to all 13 flaring AR cases that are subject to certain selection criteria. We found that applying the WG M method between 1000 and 1800 km above the solar surface would improve the prediction of the flare onset time by around 2–8 hr. Certain caveats and an outlook for future work along these lines are also discussed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020. The American Astronomical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | The Sun; Space weather; Solar corona; Solar flares; Solar activity; Solar photosphere; Solar chromosphere; Solar magnetic fields; Solar active regions; Sunspots; Delta sunspots; Solar active region magnetic fields |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Funding Information: | Funder Grant number Science and Technology Facilities Council ST/M000826/1 The Royal Society IE141493; IE161153 European Commission - Horizon 2020 739500; 824135 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 27 May 2020 10:27 |
Last Modified: | 10 Jul 2020 12:10 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.3847/1538-4357/ab8fa2 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161241 |