22 December 2023
20231221 Week Rotation Today Rotation Week 20231223



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E10N64
(-70",894")
E20-W09
(29)
0.4 -0.7 -1.0e20
2 W29S39
(367",-594")
W23-W37
(14)
0.3 -3.9 -2.5e20
3 W42S40
(503",-607")
W38-W46
(8)
0.1 -1.7 -3.4e19
4 W18N58
(157",844")
W12-W23
(11)
0.1 -1.4 -3.1e19

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 22-Dec-2023 20:30 UT .