22 January 2025
⇐20250121 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250123⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E43S67
(-263",-867") 		E56-W19
(75) 		1.8 0.4 2.9e20
2 E10S42
(-130",-592") 		E20-W01
(21) 		0.7 0.6 8.8e19

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 22-Jan-2025 20:30 UT .