21 February 2025
20250220 Week Rotation Today Rotation Week 20250222



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E38S57
(-325",-761")
E71-W11
(82)
4.3 0.6 8.4e20
2 E53N17
(-738",353")
E63-E30
(33)
3.3 2.0 1.9e21
3 E47S30
(-618",-411")
E78-E15
(63)
2.6 4.7 2.9e21
4 W15N17
(239",392")
W10-W19
(9)
0.2 -17.6 -6.7e20
5 W08N17
(126",395")
W05-W10
(5)
0.1 -17.1 -3.6e20

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 21-Feb-2025 20:30 UT .