20 April 2023
20230419 Week Rotation Today Rotation Week 20230421



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E18S55
(-170",-729")
E51-W23
(74)
3.6 -1.4 -1.3e21
2 E54S07
(-766",-67")
E70-E40
(30)
1.7 -1.4 -6.2e20
3 E15N03
(-251",137")
E17-E13
(4)
0.1 -1.4 -1.6e19

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 20-Apr-2023 23:30 UT .