... With the launch of SOHO in 1995, the measurements of spectral line widths in different so lar features, coronalholes, `quiet' and active regions has been published (Teriaca et al. ...
... High-energy solar particles originating from flares as well as from other solar activity phenomena (eruptive prominences, CMEs and coronalholes) can produce geomagnetic disturbances on Earth if they arrive at and interact with the magnetosphere. ...
... occurs during the years around 1971, when the aa index has a delayed peak in its activity cycle, probably due to the fast solar wind and recurrent geomagnetic storms produced by near-equatorial coronalholes during the descending phase of the solar cycles ...
... Coronal oscillations from GIS The long period (P = 10 15 min) slow waves have been observed so far only in open magnetic structures in coronalholes (DeForest & Gurman 1998; Ofman et al. ...
... Uninterrupted space observations with long-time surveys of coronalholes in equatorial and polar regions, available through a dedicated mission such as ADAHELI+, will advance our understanding of where and how the fast solar wind is generated and ...