27 July 2021
20210726 Week Rotation Today Rotation Week 20210728



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W06N72
(28",865")
E52-W73
(125)
2.5 1.1 1.1e21
2 W04N14
(56",146")
E00-W06
(6)
0.3 -2.5 -1.0e20
3 E20N09
(-316",70")
E22-E17
(5)
0.0 1.1 7.6e18

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 27-Jul-2021 11:30 UT .