19 September 2023
20230918 Week Rotation Today Rotation Week 20230920



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E19N46
(-215",604")
E40-W16
(56)
1.8 -3.2 -1.1e21
2 W08N06
(131",-21")
W03-W13
(10)
1.1 -3.3 -5.7e20
3 W35S47
(371",-762")
W29-W46
(17)
0.2 2.0 1.5e20
4 E14N54
(-132",700")
E17-E10
(7)
0.0 -1.8 -1.7e19

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 19-Sep-2023 23:30 UT .