20 January 2025
⇐20250119 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250121⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W55S25
(730",-364") 		W41-W72
(31) 		1.2 -5.2 -1.8e21
2 E28S70
(-154",-887") 		E40-W17
(57) 		1.1 0.5 2.1e20

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 20-Jan-2025 20:30 UT .