18 September 2023
20230917 Week Rotation Today Rotation Week 20230919



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E29N44
(-331",587")
E50-W01
(51)
1.6 -3.7 -1.3e21
2 E08N00
(-127",-115")
E12-E02
(10)
1.0 -3.2 -5.1e20
3 W35S44
(394",-730")
W13-W48
(35)
0.7 4.7 1.0e21
4 W42S06
(632",-180")
W39-W44
(5)
0.1 9.4 1.4e20
5 E66N69
(-306",870")
E63-E62
(1)
0.0 -1.1 -2.7e19

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 18-Sep-2023 23:30 UT .