Published on 30 Jul 2013
Recorded on July 16, 2013 | 00h30-23h30 UTC
Second rotation for this massive coronal hole CH577 (ancient CH574). CH577 is fixed on the northern hemisphere with a partial geoeffective position.
A coronal hole is an unipolar magnetic field opens towards the interplanetary space. On composite wavelengths of UV light, a coronal hole appear dark because there is less matter at the T° we are observing in. Here, the transition between wavelengths works well.
SDO combined AIA | Full HD Quality Video | 1920x1080p