16 September 2023
20230915 Week Rotation Today Rotation Week 20230917



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W27N42
(318",556")
38
(3.1e04)
-4.5 3.2 9.8e20
2 W17S45
(199",-753")
E00-W32
(32)
1.4 2.3 8.1e20
3 E52N42
(-555",582")
E76-E36
(40)
0.9 -2.2 -5.6e20
4 W04N19
(70",200")
E04-W09
(13)
0.5 6.7 5.2e20
5 E24N55
(-223",719")
E28-E15
(13)
0.3 -1.1 -7.6e19

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 16-Sep-2023 23:30 UT .