16 April 2023
20230415 Week Rotation Today Rotation Week 20230417



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E49S48
(-480",-669")
E70-E09
(61)
2.1 -1.3 -8.3e20
2 E09S66
(-64",-831")
E20-W13
(33)
0.2 -0.8 -6.1e19
3 E37S09
(-571",-73")
E39-E36
(3)
0.0 -3.5 -2.6e19

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 16-Apr-2023 23:30 UT .