Variations of the magnetic fields in large solar flares

H. Schunker; A. C. Donea

doi:10.1023/A:1025559319434

Variations of the magnetic fields in large solar flares

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Abstract

We present preliminary results from high resolution observations obtained with the Michelson Doppler Imager (MDI) instrument on the SOHO of two large solar flares of 14 July 2000 and 24 November 2000. We show that rapid variations of the line-of-sight magnetic field occured on a time scale of a few minutes during the flare explosions. The reversibility/irreversibility of the magnetic field of both active regions is a very good tool for understanding how the magnetic energy is released in these flares. The observed sharp increase of the magnetic energy density at the time of maximum of the solar flare could involve an unknown component which deposited supplementary energy into the system.

Original language	English
Pages (from-to)	99-102
Number of pages	4
Journal	Space Science Reviews
Volume	107
Issue number	1-2
DOIs	https://doi.org/10.1023/A:1025559319434
Publication status	Published - 31 Oct 2003
Externally published	Yes

Keywords

Magnetic fields
Solar flares
Sun

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10.1023/A:1025559319434

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AU - Donea, A. C.

PY - 2003/10/31

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N2 - We present preliminary results from high resolution observations obtained with the Michelson Doppler Imager (MDI) instrument on the SOHO of two large solar flares of 14 July 2000 and 24 November 2000. We show that rapid variations of the line-of-sight magnetic field occured on a time scale of a few minutes during the flare explosions. The reversibility/irreversibility of the magnetic field of both active regions is a very good tool for understanding how the magnetic energy is released in these flares. The observed sharp increase of the magnetic energy density at the time of maximum of the solar flare could involve an unknown component which deposited supplementary energy into the system.

AB - We present preliminary results from high resolution observations obtained with the Michelson Doppler Imager (MDI) instrument on the SOHO of two large solar flares of 14 July 2000 and 24 November 2000. We show that rapid variations of the line-of-sight magnetic field occured on a time scale of a few minutes during the flare explosions. The reversibility/irreversibility of the magnetic field of both active regions is a very good tool for understanding how the magnetic energy is released in these flares. The observed sharp increase of the magnetic energy density at the time of maximum of the solar flare could involve an unknown component which deposited supplementary energy into the system.

KW - Magnetic fields

KW - Solar flares

KW - Sun

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JO - Space Science Reviews

JF - Space Science Reviews

SN - 0038-6308

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Variations of the magnetic fields in large solar flares

Abstract

Keywords

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