22 April 2023
20230421 Week Rotation Today Rotation Week 20230423



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E29S07
(-463",-45")
E55-E05
(50)
4.5 -2.2 -1.8e21
2 W25S56
(228",-750")
E31-W50
(81)
3.9 -1.2 -1.2e21
3 W11N03
(174",137")
W09-W12
(3)
0.1 -1.9 -1.8e19

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 22-Apr-2023 23:30 UT .