17 September 2023
20230916 Week Rotation Today Rotation Week 20230918



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E40N43
(-453",578")
E60-E24
(36)
1.2 -2.8 -7.8e20
2 W23S44
(265",-742")
W02-W35
(33)
1.0 2.7 7.4e20
3 E21S04
(-348",-171")
E25-E16
(9)
0.8 -3.6 -4.7e20
4 W28S04
(442",-168")
W22-W34
(12)
0.6 2.7 2.7e20
5 W47N33
(593",443")
W43-W51
(8)
0.0 -9.6 -9.6e19
6 W39N38
(466",517")
W35-W42
(7)
0.0 -3.0 -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 17-Sep-2023 23:30 UT .