2 April 2025
⇐20250401 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250403⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W13N13
(214",319") 		W03-W22
(19) 		1.6 -5.1 -1.4e21
2 E22N26
(-329",514") 		E28-E12
(16) 		0.8 -4.8 -8.1e20
3 E21S26
(-304",-327") 		E24-E17
(7) 		0.2 -2.5 -9.5e19
4 E50N01
(-738",87") 		E55-E45
(10) 		0.1 -6.9 -2.1e20
5 E03S23
(-39",-274") 		E05-W01
(6) 		0.1 -9.4 -1.0e20
6 E72S27
(-811",-410") 		E78-E68
(10) 		0.1 -4.3 -1.1e20
7 E55S02
(-784",27") 		E57-E52
(5) 		0.0 -7.7 -7.7e19

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 2-Apr-2025 23:30 UT .