20 December 2023
20231219 Week Rotation Today Rotation Week 20231221



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W27S34
(364",-532")
W11-W42
(31)
1.0 -4.9 -9.9e20
2 W03S39
(42",-595")
E05-W10
(15)
0.4 -3.3 -2.7e20
3 W68N17
(864",300")
W59-W81
(22)
0.3 1.3 1.8e20
4 W39S03
(618",-22")
W34-W44
(10)
0.3 -0.7 -3.4e19
5 E35N63
(-248",882")
E41-E37
(4)
0.1 -0.7 -3.6e19
6 W43N06
(661",130")
W41-W45
(4)
0.1 3.1 6.1e19
7 E32S59
(-272",-822")
E39-E28
(11)
0.1 -0.3 -7.8e18

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 20-Dec-2023 20:30 UT .