21 December 2022
20221220 Week Rotation Today Rotation Week 20221222



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W13N10
(217",190")
E07-W24
(31)
2.0 0.7 2.2e20
2 W52N19
(729",331")
W42-W60
(18)
0.7 1.6 3.0e20
3 E14N19
(-224",344")
E18-E08
(10)
0.6 30.3 3.0e21
4 E50S56
(-417",-799")
E49-E36
(13)
0.4 -1.1 -2.0e20
5 W34N21
(507",380")
W27-W40
(13)
0.4 7.6 6.2e20
6 W05S07
(77",-95")
W03-W06
(3)
0.0 -1.0 -5.8e18

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 21-Dec-2022 20:30 UT .