Solar wind streams originate from low-density, magnetically open regions of the sun's
corona, known as coronal holes. The locations, areal sizes, rotation, and solar-cycle …

Coronal holes are usually defined as dark structures seen in the extreme ultraviolet and X-
ray spectrum which are generally associated with open magnetic fields. Deriving reliably the …

The energetical aspect of solar phenomena of different spatial and time scales has been
studied with special attention to global magnetic fields. Cyclic regularities in the heliosphere …

We study the spatial-temporal evolution of a coronal hole and compare it with that of the
solar global magnetic field in Cycles 21–23 (1976–2012). We also analyze the latitude …

Context. Coronal holes are low-density and unipolar magnetic field structures in the solar
corona that trigger geomagnetic disturbances on the Earth. Hence, it is important to …

Context. The present paper discusses results of a statistical study of the characteristics of
coronal hole (CH) rotation in order to find connections to the internal rotation of the Sun …

We present identifications of coronal holes (CHs) from observations in the He i 10 830 Å line
made at Kitt Peak Observatory (from 1975 to 2003) and in the EUV 195 Å wavelength with …

The parameters of the magnetic flux distribution inside low-latitude coronal holes (CHs)
were analyzed. A statistical study of 44 CHs based on Solar and Heliospheric Observatory …

The structure and variations of open field regions (OFRs) are analyzed against the solar
cycle for the time interval of 1970–1996. The cycle of the large-scale magnetic field (LSMF) …

ABSTRACT From 2001–2008, we use full-disk, SOHO/EIT 195 Å calibrated images to
determine latitudinal and day-to-day variations of the rotation rates of coronal holes (CHs) …