18 July 2021
20210717 Week Rotation Today Rotation Week 20210719



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E17S09
(-267",-219")
E31-W05
(36)
4.1 0.1 3.6e19
2 E10N71
(-55",866")
E78-W82
(160)
1.8 1.3 8.9e20
3 W06S71
(31",-916")
E08-W11
(19)
0.1 -0.9 -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 18-Jul-2021 23:30 UT .