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Long-term evolution of a high-latitude active regionThe decay phase of one of the largest active regions of solar cycle 22 that developed by the end of June 1987 is studied. Migration of the magnetic fields northward, poleward, and equatorward is shown to lead to the apparent rotation of the magnetic axis of the region. The sunspot motions and pattern of evolution of the magnetic fields noted provide evidence for the existence of a large-scale velocity field within the active region.
Document ID
19890035193
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Marquette, William H.
(Big Bear Solar Observatory Big Bear City, CA, United States)
Martin, Sara F.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Solar Physics
Volume: 117
Issue: 2 19
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
89A22564
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-87-0023
CONTRACT_GRANT: NGL-05-002-034
CONTRACT_GRANT: NSF ATM-85-13577
Distribution Limits
Public
Copyright
Other

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