31 July 2023
⇐20230730 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230801⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W09N33
(124",438") 		E05-W18
(23) 		0.6 2.8 3.1e20
2 W33N50
(334",670") 		W22-W40
(18) 		0.1 -0.4 -1.4e19
3 W16N51
(160",678") 		W11-W21
(10) 		0.1 1.1 2.6e19

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 31-Jul-2023 23:30 UT .