19 February 2025
20250218 Week Rotation Today Rotation Week 20250220



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E50S66
(-298",-852")
E68-E07
(61)
1.3 0.4 2.2e20
2 E60S29
(-736",-420")
E82-E44
(38)
0.7 3.1 7.2e20
3 E13N17
(-202",390")
E15-E10
(5)
0.1 -11.0 -2.1e20
4 E35S47
(-381",-636")
E42-E25
(17)
0.1 -0.5 -8.1e18
5 W55N44
(572",720")
W51-W60
(9)
0.0 1.8 3.0e19

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 19-Feb-2025 20:30 UT .