9 April 2025
⇐20250408 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250410⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W28S33
(373",-442") 		E11-W40
(51) 		3.0 -4.9 -2.8e21
2 E39N38
(-479",649") 		E46-E30
(16) 		0.4 2.0 2.4e20
3 W52S01
(757",46") 		W45-W59
(14) 		0.3 -5.0 -3.9e20
4 W36S54
(332",-720") 		W29-W45
(16) 		0.2 0.8 3.8e19
5 E25N05
(-403",172") 		E28-E22
(6) 		0.1 8.1 1.5e20
6 E22S37
(-291",-496") 		E24-E20
(4) 		0.1 -2.9 -5.5e19
7 E17S39
(-223",-528") 		E21-E15
(6) 		0.1 -4.8 -5.7e19

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 9-Apr-2025 23:30 UT .