17 July 2025
⇐20250716 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250718⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W48S48
(471",-732") 		E44-W81
(125) 		8.2 1.2 3.8e21
2 E33N18
(-487",232") 		E56-E15
(41) 		3.6 -4.4 -2.9e21
3 W52N06
(741",48") 		W49-W54
(5) 		0.0 5.6 6.1e19

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-Jul-2025 23:30 UT .