30 January 2025
⇐20250129 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250131⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W17N15
(270",351") 		E33-W45
(78) 		9.1 3.6 5.8e21
2 W20S36
(276",-496") 		E22-W48
(70) 		4.9 5.2 4.9e21
3 W31S43
(369",-592") 		W24-W39
(15) 		0.2 -2.6 -1.1e20
4 W12S51
(124",-696") 		W06-W17
(11) 		0.1 -2.2 -5.6e19
5 W19S44
(234",-604") 		W14-W25
(11) 		0.1 -2.7 -5.9e19
6 W49S42
(547",-605") 		W49-W54
(5) 		0.1 -2.9 -7.4e19
7 E16N11
(-265",285") 		E18-E13
(5) 		0.0 6.3 4.4e19
8 W12S45
(145",-615") 		W09-W15
(6) 		0.0 -2.6 -2.1e19

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 30-Jan-2025 20:30 UT .