Abstract
The longitudinal distribution of coronal holes has been analyzed for the time interval 1976–2002. Coronal holes don't seem to be randomly distributed. The cluster structure has been revealed in the time—space organization of coronal hole distribution. The complexity and lifetime of clusters depend on the solar cycle phase. The comparison of active region and coronal hole cluster structures shows that some coronal hole clusters as well as active region ones occur almost simultaneously in both hemispheres, some clusters in the north or in the south hemisphere only. Some coronal hole clusters coincide with the active region clusters and some do not coincide. They reflect the large-scale solar magnetic field distribution.
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Bilenko, I.A. Longitudinal Distribution of Coronal Holes During 1976–2002. Solar Physics 221, 261–282 (2004). https://doi.org/10.1023/B:SOLA.0000035067.88819.40
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DOI: https://doi.org/10.1023/B:SOLA.0000035067.88819.40