Structure of a Large low-Latitude Coronal Hole
Dobrzycka, D.; Del Zanna, G.; Gopalswamy, N.; Alexander, D.; Bromage, B. J. J.; Breen, A.; Clegg, J. R.; DeForest, C.; Thompson, B.; Browning, P. K.
United Kingdom, United States, Germany
Abstract
Coronal holes on the Sun are the source of high-speed solar wind streams that produce magnetic disturbances at the Earth. A series of multi-wavelength, multi-instrument observations obtained during the 1996 `Whole Sun Month' campaign examined a large coronal hole in greater detail than ever before. It appeared on the Sun in August, and extended from the north pole to a large active region in the southern hemisphere. Its physical and magnetic structure and subsequent evolution are described.