18 September 2024
20240917 Week Rotation Today Rotation Week 20240919



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E44N06
(-662",8")
E56-E34
(22)
0.6 2.3 2.9e20
2 W20N33
(273",417")
W15-W23
(8)
0.1 6.9 1.6e20
3 W29N29
(400",375")
W25-W32
(7)
0.1 8.0 1.2e20
4 W13S25
(199",-511")
W11-W14
(3)
0.0 -13.7 -1.1e20

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 18-Sep-2024 23:30 UT .