25 April 2023
20230424 Week Rotation Today Rotation Week 20230426



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W17S07
(283",-44")
E18-W34
(52)
7.3 -1.8 -2.2e21
2 W41S59
(324",-782")
E04-W74
(78)
2.6 -1.2 -1.0e21
3 E31N29
(-436",520")
E40-E19
(21)
1.1 -5.8 -1.4e21
4 W02N36
(28",630")
E01-W05
(6)
0.1 -1.1 -2.7e19

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 25-Apr-2023 23:30 UT .