Coronal holes and complexes of activity on the Sun
The paper is devoted to the phenomenology analysis and to the statistics of two types of solar activity – coronal holes and complexes of activity. Considering the analysis of the spatial-time distribution of these formations on the Sun surface during the increase phase of the 24 solar activity cycle it is shown that the given types of structures on the Sun are related to each other other genetically. Low-latitudinal coronal holes may be considered to be caused by evolving the magnetic fields of activity complexes. It is concluded that complexes of activity should be regarded as the essential type of structures generating the geoeffective disturbances influencing the Earth`s coats during all stages of their evolution.