28 July 2021
⇐20210727 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210729⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W10N64
(71",804") 		E82-W63
(145) 		5.0 0.8 1.2e21
2 E20S07
(-327",-200") 		E27-E15
(12) 		0.8 -0.9 -1.2e20
3 W21N12
(329",114") 		W18-W24
(6) 		0.3 -1.5 -6.7e19
4 W13N29
(179",383") 		W09-W16
(7) 		0.1 -6.8 -9.5e19

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 28-Jul-2021 19:30 UT .