1 February 2025
20250131 Week Rotation Today Rotation Week 20250202



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W45N17
(660",349")
E04-W68
(72)
6.3 3.8 5.7e21
2 W45S35
(567",-492")
W13-W72
(59)
1.9 3.9 1.8e21
3 W25S66
(166",-849")
W03-W70
(67)
0.7 0.3 7.1e19
4 W09S48
(105",-655")
W07-W12
(5)
0.1 1.1 2.5e19
5 W52S43
(559",-615")
W48-W59
(11)
0.1 -3.2 -7.9e19

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 1-Feb-2025 20:30 UT .