25 January 2024
20240124 Week Rotation Today Rotation Week 20240126



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E19N42
(-240",720")
E54-W16
(70)
3.6 -2.8 -2.4e21
2 E22S23
(-342",-306")
E41-W05
(46)
3.2 -6.9 -3.8e21
3 W29N60
(236",879")
W25-W32
(7)
0.1 -2.3 -6.0e19
4 W15N63
(111",906")
W07-W21
(14)
0.1 -1.9 -4.6e19

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 25-Jan-2024 20:30 UT .