31 May 2025
20250530 Week Rotation Today Rotation Week 20250601



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W41N40
(474",622")
E32-W70
(102)
10.1 -2.1 -5.7e21
2 E45S34
(-552",-520")
E71-E13
(58)
3.4 -2.3 -2.0e21
3 E18S58
(-157",-798")
E26-E12
(14)
0.1 2.3 5.1e19
4 E33S58
(-268",-801")
E37-E28
(9)
0.1 -0.5 -1.0e19
5 W03N64
(20",857")
E03-W07
(10)
0.1 -0.3 -6.6e18
6 E37N44
(-406",668")
E40-E33
(7)
0.1 -0.6 -9.5e18

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 31-May-2025 23:30 UT .