30 April 2022
20220429 Week Rotation Today Rotation Week 20220501



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W13S75
(55",-898")
E33-W77
(110)
0.9 -0.5 -2.0e20
2 W65S16
(832",-232")
W61-W68
(7)
0.1 -5.9 -2.2e20
3 W28S38
(354",-533")
W25-W30
(5)
0.1 -4.3 -5.2e19
4 E24S64
(-173",-826")
E32-E16
(16)
0.0 -1.1 -1.7e19

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 30-Apr-2022 23:30 UT .