NASA NTRS · 19990028057
An equatorial coronal hole at solar minimum
Abstract
The large transequatorial coronal hole that was observed in the solar corona at the end of August 1996 is presented. It consists of a north polar coronal hole called the 'elephant's trunk or tusk'. The observations of this coronal hole were carried out with the coronal diagnostic spectrometer onboard the Solar and Heliospheric Observatory (SOHO). The magnetic field associated with the equatorial coronal hole is strongly connected to that of the active region at its base, resulting in the two features rotating at almost the same rate.
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Bromage, B. J. I., DelZanna, G., DeForest, C., Thompson, B., Clegg, J. R.. 1997-09-01. An equatorial coronal hole at solar minimum. https://ntrs.nasa.gov/citations/19990028057
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