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Detailed analysis of flares, magnetic fields and activity in the sunspot group of Sept. 13-26, 1963

Zirin, Harold and Werner, Susan (1967) Detailed analysis of flares, magnetic fields and activity in the sunspot group of Sept. 13-26, 1963. Solar Physics, 1 (1). pp. 66-100. ISSN 0038-0938. https://resolver.caltech.edu/CaltechAUTHORS:20200702-130826157

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Abstract

We analyze large-scale H-alpha movies of the large spot group of Sept. 13–26, 1963, together with radio, ionospheric and magnetic field data as well as white light pictures. The evolution of the group and associated magnetic fields is followed, and the positions of solar flares relative to the fields are noted, along with their morphology. Although the magnetic field is deformed in time, characteristic field structures may be traced through the deformation as the seat of recurrent homologous flares. We find that most flares are homologous, and some are triggered by disturbances elsewhere in the region. We note events produced by surges falling back to the surface, and one flare initiated by a bright bead seen to fly across the region. In almost every case of an isolated type III radio burst, a corresponding H-alpha brightening could be found, but not all flares produced bursts. Flares close to the sunspots are most likely to produce radio bursts. Flare surface waves in the region all travel out to the west, because of more open magnetic field structure there. In one case (Sept. 25) a wave is turned back by the closed field structure to the east. In almost all cases the time association of radio or ionospheric events is with the beginning of the flare or with the flash phase. Several morphological classes of flares are noted as recurrent types.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/bf00150304DOIArticle
https://ui.adsabs.harvard.edu/abs/1967SoPh....1...66Z/abstractADSArticle
Additional Information:© 1967 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 05 August 1966; Issue Date January 1967.
Subject Keywords:Flare; Solar Flare; Radio Burst; Field Structure; Sunspot Group
Issue or Number:1
Record Number:CaltechAUTHORS:20200702-130826157
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200702-130826157
Official Citation:Zirin, H., Werner, S. Detailed analysis of flares, magnetic fields and activity in the sunspot group of Sept. 13–26, 1963. Sol Phys 1, 66–100 (1967). https://doi.org/10.1007/BF00150304
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104211
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Jul 2020 20:21
Last Modified:02 Jul 2020 20:21

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