26 April 2025
⇐20250425 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250427⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W41S48
(419",-673") 		E07-W85
(92) 		7.5 1.3 2.7e21
2 W44N35
(543",588") 		W35-W56
(21) 		0.7 1.6 3.0e20
3 E29N22
(-432",421") 		E36-E21
(15) 		0.6 -4.7 -5.1e20
4 E27N00
(-427",69") 		E30-E22
(8) 		0.5 -4.5 -3.8e20
5 E14S45
(-160",-620") 		E21-E06
(15) 		0.3 1.0 6.9e19
6 E37S20
(-538",-275") 		E40-E35
(5) 		0.2 -6.2 -2.6e20
7 E27S56
(-244",-748") 		E39-E21
(18) 		0.1 -0.3 -9.8e18
8 E29S13
(-453",-145") 		E31-E27
(4) 		0.1 -4.1 -4.5e19
9 W37N19
(546",373") 		W35-W40
(5) 		0.0 16.2 1.6e20

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 26-Apr-2025 23:30 UT .