12 April 2025
20250411 Week Rotation Today Rotation Week 20250413



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W44S38
(523",-529")
W27-W59
(32)
0.7 -3.0 -5.1e20
2 W06N38
(84",663")
E02-W11
(13)
0.5 3.9 3.9e20
3 W23N23
(342",449")
W15-W33
(18)
0.5 10.2 8.7e20
4 W21S36
(276",-495")
W18-W25
(7)
0.2 -6.0 -1.9e20
5 W18N04
(295",163")
W15-W21
(6)
0.1 5.8 1.3e20

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 12-Apr-2025 23:30 UT .