18 January 2023
20230117 Week Rotation Today Rotation Week 20230119



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E29S67
(-187",-865")
E48-W19
(67)
1.3 -0.5 -2.4e20
2 E40S09
(-616",-95")
E49-E30
(19)
0.8 2.2 3.5e20
3 W19N45
(229",742")
W10-W29
(19)
0.8 -0.5 -9.5e19
4 W33N45
(376",739")
W32-W38
(6)
0.1 -0.5 -1.9e19
5 E15N54
(-147",836")
E16-E09
(7)
0.1 -0.9 -2.5e19

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 18-Jan-2023 20:30 UT .