26 July 2021
20210725 Week Rotation Today Rotation Week 20210727



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W08N71
(45",858")
E64-W68
(132)
2.8 0.8 8.3e20
2 E03N16
(-46",178")
E04-E01
(3)
0.2 -3.2 -8.6e19
3 W46S05
(677",-139")
W42-W50
(8)
0.2 -0.4 -1.6e19
4 W20S69
(115",-909")
W17-W25
(8)
0.1 -1.0 -5.6e19
5 W29S13
(454",-283")
W26-W33
(7)
0.1 -0.8 -9.2e18

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 26-Jul-2021 23:30 UT .