28 January 2025
20250127 Week Rotation Today Rotation Week 20250129



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E22N15
(-358",345")
E56-W18
(74)
8.7 3.2 4.8e21
2 E26S36
(-346",-493")
E49-W17
(66)
4.5 5.3 4.6e21
3 W17S66
(113",-852")
E48-W59
(107)
3.7 0.2 2.8e20
4 W10S42
(123",-583")
W02-W14
(12)
0.2 -1.9 -6.5e19

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 28-Jan-2025 20:30 UT .