25 July 2021
⇐20210724 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210726⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W11N68
(66",840") 		E70-W87
(157) 		3.3 0.9 9.8e20
2 W30S12
(462",-264") 		W04-W46
(42) 		2.7 -0.1 -5.1e19
3 W30N41
(360",557") 		W22-W45
(23) 		0.4 0.4 3.9e19
4 W14N17
(224",200") 		W07-W20
(13) 		0.4 2.4 1.5e20
5 W02S67
(13",-900") 		E11-W17
(28) 		0.3 -0.4 -5.6e19
6 E17N16
(-261",186") 		E19-E14
(5) 		0.2 -4.3 -1.4e20
7 W53N05
(750",22") 		W48-W58
(10) 		0.2 0.5 2.6e19
8 W47N01
(695",-39") 		W45-W50
(5) 		0.0 -1.7 -1.7e19

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 25-Jul-2021 23:30 UT .