21 December 2023
20231220 Week Rotation Today Rotation Week 20231222



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W30S37
(391",-566")
W08-W51
(43)
1.5 -3.4 -1.1e21
2 E26N64
(-188",889")
E42-E05
(37)
0.5 -0.5 -1.1e20
3 W58N05
(829",105")
W52-W67
(15)
0.3 1.3 1.3e20
4 W37N00
(587",24")
5
(1.2e03)
4.1 12.9 1.5e20
5 W08S52
(86",-751")
W04-W13
(9)
0.1 -0.8 -1.2e19
6 W41S49
(423",-720")
W39-W44
(5)
0.1 -0.6 -1.0e19
7 E08S63
(-63",-856")
E11-E05
(6)
0.0 -1.1 -1.2e19

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-2023 20:30 UT .