30 April 2024
⇐20240429 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20240501⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E12N14
(-197",293") 		E22-W08
(30) 		1.5 4.2 1.1e21
2 E31S14
(-474",-169") 		E35-E25
(10) 		1.0 5.6 9.4e20
3 W32N56
(284",823") 		W13-W49
(36) 		0.8 -0.9 -2.8e20
4 W43N24
(595",439") 		W39-W47
(8) 		0.3 -5.2 -3.3e20
5 E17S62
(-133",-807") 		E20-E14
(6) 		0.1 1.0 3.7e19
6 E38N18
(-558",342") 		E40-E35
(5) 		0.1 3.2 4.4e19
7 E25S68
(-153",-856") 		E26-E19
(7) 		0.1 -0.6 -1.3e19

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 30-Apr-2024 23:30 UT .