17 April 2025
⇐20250416 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250418⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E36S39
(-441",-545") 		E56-W10
(66) 		13.0 2.6 7.6e21
2 E29S16
(-445",-180") 		E32-E25
(7) 		0.1 6.7 7.3e19
3 E17S02
(-273",46") 		E18-E15
(3) 		0.0 0.9 6.0e18

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 17-Apr-2025 23:30 UT .