20 February 2025
20250219 Week Rotation Today Rotation Week 20250221



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E54S30
(-688",-415")
E79-E28
(51)
1.3 3.8 1.4e21
2 E54S56
(-441",-759")
E72-E54
(18)
1.2 0.5 2.1e20
3 E65N22
(-816",409")
E71-E55
(16)
0.4 1.0 1.6e20
4 -47
(399",E00N17")
5
(1.9e03)
-11.3 2.1 4.0e19

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-Feb-2025 20:30 UT .