24 April 2025
20250423 Week Rotation Today Rotation Week 20250425



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W42S47
(438",-657")
E25-W81
(106)
13.3 1.5 5.3e21
2 W14N35
(195",615")
E13-W28
(41)
3.7 5.2 4.0e21
3 W02S07
(37",-34")
E02-W04
(6)
0.2 3.8 1.3e20

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 24-Apr-2025 23:30 UT .