21 January 2025
⇐20250120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250122⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E42S63
(-303",-832") 		105
(9.0e04) 		0.2 3.3 3.0e21
2 W69S25
(829",-379") 		W60-W81
(21) 		0.4 -2.2 -4.0e20

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 21-Jan-2025 20:30 UT .