18 May 2024
20240517 Week Rotation Today Rotation Week 20240519



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E40N52
(-375",765")
E71-E17
(54)
2.8 -1.4 -1.3e21
2 E22S60
(-178",-805")
E29-E14
(15)
0.1 0.4 1.9e19
3 E44S42
(-495",-613")
E53-E41
(12)
0.1 -1.0 -2.8e19

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 18-May-2024 23:30 UT .