28 September 2023
20230927 Week Rotation Today Rotation Week 20230929



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W11N38
(141",495")
E12-W28
(40)
2.1 6.5 2.4e21
2 E23N07
(-373",13")
E28-E16
(12)
0.5 2.4 1.9e20
3 E31S50
(-316",-794")
E46-E20
(26)
0.3 1.1 1.2e20
4 W15S09
(240",-258")
W06-W19
(13)
0.2 -1.8 -7.2e19
5 W36N54
(335",712")
W24-W45
(21)
0.1 -1.4 -5.3e19

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 28-Sep-2023 23:30 UT .