18 June 2025
⇐20250617 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250619⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W33S42
(385",-645") 		E27-W79
(106) 		12.5 2.0 6.2e21
2 E61S06
(-823",-108") 		E75-E49
(26) 		0.8 -2.1 -4.9e20
3 E29N01
(-465",-10") 		E33-E27
(6) 		0.1 -1.2 -2.4e19
4 E10N39
(-122",583") 		E11-E08
(3) 		0.1 4.5 4.9e19

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 18-Jun-2025 19:30 UT .