22 April 2014
20140421 Week Rotation Today Rotation Week 20140423



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W17S60
(139",-788")
E39-W45
(84)
3.2 -0.3 -1.0e33
2 W09N56
(85",832")
E22-W24
(46)
1.4 -0.2 -4.3e32
3 E38N45
(-415",723")
E56-E22
(34)
1.1 0.5 6.3e32

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 22-Apr-2014 23:35 UT .