Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region

Aleksandr Borovik; Anton Zhdanov

doi:10.12737/szf-81202202

UDC 523

SMALL SOLAR FLARES AND LOCAL POLARITY INVERSION LINES OF THE LONGITUDINAL MAGNETIC FIELD OF THE ACTIVE REGION Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region

АА Аа

Published in Solnechno-Zemnaya Fizika · Volume 8, Issue 1 · Pages 19–23 · Rubric: Results of current research

DOI: https://doi.org/10.12737/szf-81202202

Received: 11.10.2021 Accepted: 13.12.2021 Published: 25.03.2022 Language of publication: RUS

Authors

Aleksandr Borovik

ORCID

Anton Zhdanov

ORCID

Aleksandr Borovik

Academic degree: candidate of physical and mathematical sciences

Institute of Solar Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Anton Zhdanov

Institute of Solar Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

ABSTRACT

Using photospheric data and data on the longitudinal magnetic field from the SDO satellite, as well as observations in the Hα line from GONG ground stations, we have studied the flare activity of the NOAA 12673 sunspot group, which in September 2017 produced the largest X9.3 class flare in the last decade. The active region was distinguished by rapid development, complex topology, and magnetic field dynamics. We have established that in the active region almost throughout the development period due to movements of diverse polar magnetic fluxes and their convergence, numerous local polarity inversion lines (LPIL) of the magnetic field were formed. Small solar flares have been found to be closely related to LPIL and to occur in those areas of LPIL where the gradient of the longitudinal magnetic field over time reaches maximum values.

KEYWORDS

active regions, small solar flares, longitudinal magnetic field structure, polarity inversion lines (PIL)

Funding

The work was performed with budgetary funding of Basic Research program II.16 and was supported by RFBR grant No. 19-52-45002

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Editor-in-Chief

Geliy Zherebtsov

solater@iszf.irk.ru

Deputy Editor-in-Chief

Aleksandr Stepanov

stepanov@gaoran.ru

Deputy Editor-in-Chief

Alexander Potapov

potapov@iszf.irk.ru

Executive Secretary of Editorial Board

Natalia Polyushkina

npol@iszf.irk.ru

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Borovik A. V., Zhdanov A. A. Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region // Solnechno-Zemnaya Fizika. 2021. no. 1. pp. 19-23. DOI: https://doi.org/10.12737/szf-81202202. (Date of access 18.10.2026).

MLA

Aleksandr Borovik, Zhdanov A. A.. "Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region." Solnechno-Zemnaya Fizika 8.1 (2021): 19-23. DOI: https://doi.org/10.12737/szf-81202202.

APA

Borovik A. V., Zhdanov A. A. (2021). Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region. Solnechno-Zemnaya Fizika, 8(1), 19-23. https://doi.org/10.12737/szf-81202202

Chicago

Aleksandr Borovik, Zhdanov A. A.. "Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region." Solnechno-Zemnaya Fizika 8, no. 1 (2021): 19-23. https://doi.org/10.12737/szf-81202202.

WIKI

{{cite journal | author = Borovik A. V., Zhdanov A. A. | title = Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region | journal = Solnechno-Zemnaya Fizika | year = 2021 | volume = 8 | issue = 1 | pages = 19-23 | doi = 10.12737/szf-81202202 }}

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SMALL SOLAR FLARES AND LOCAL POLARITY INVERSION LINES OF THE LONGITUDINAL MAGNETIC FIELD OF THE ACTIVE REGION Small solar flares and local polarity inversion lines of the longitudinal magnetic field of the active region

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