Published 1991 | public
Book Section - Chapter

The longer term evolution of magnetic field and mass flow in a decaying active region

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Abstract

During September 24-29, 1987, the longitudinal magnetic fields of a decaying active region (AR 4855) were observed almost continuously at Big Bear and Huairou Solar Observatories. The target consisted of an αp sunspot and surrounding enhanced network. We achieved a 75-hour coverage with 4 night-time gaps of six to eight hours. The images were then combined to made a continuous movie.

Additional Information

© Springer-Verlag 1991. We are grateful to the staff at Huairou Solar Observing Station and Big Bear Solar Observatory for their support in making the observations. This research was supported by the Chinese Academy of Sciences and National Science Foundation of China and NSF of U.S.A. under the grant NSF INT-8814395.

Additional details

Created:
August 22, 2023
Modified:
January 15, 2024