23 December 2021
⇐20211222 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211224⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E19N49
(-207",756") 		E38-W27
(65) 		7.6 0.7 1.4e21
2 E27N06
(-438",131") 		E33-E18
(15) 		0.6 1.1 1.1e20
3 W38S74
(163",-932") 		W28-W59
(31) 		0.2 -0.5 -6.8e19

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 23-Dec-2021 20:30 UT .