30 December 2023
20231229 Week Rotation Today Rotation Week 20231231



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20S22
(306",-324")
E08-W32
(40)
4.4 -4.7 -3.5e21
2 W09N44
(107",713")
E20-W21
(41)
2.1 -4.2 -2.0e21
3 W16S58
(138",-808")
E16-W35
(51)
1.3 1.1 4.2e20
4 E19N41
(-239",671")
E24-E13
(11)
0.2 0.7 3.0e19
5 E22S40
(-286",-592")
E24-E20
(4)
0.0 -0.9 -7.9e18

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 30-Dec-2023 20:30 UT .