21 January 2024
⇐20240120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20240122⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E57S17
(-786",-237") 		E72-E48
(24) 		0.8 -1.8 -4.0e20
2 E56S74
(-218",-922") 		E81-E33
(48) 		0.1 -0.3 -2.9e19
3 W01S25
(21",-339") 		4
(1.7e03) 		-11.2 3.7 6.3e19
4 E57S25
(-741",-361") 		E62-E52
(10) 		0.1 -1.3 -3.5e19
5 E71N39
(-714",636") 		E77-E70
(7) 		0.1 -1.1 -7.3e19
6 W05N03
(78",145") 		E02-W07
(9) 		0.1 -3.2 -3.9e19
7 E27N60
(-220",880") 		E37-E21
(16) 		0.1 -2.5 -5.6e19

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-Jan-2024 20:30 UT .