17 June 2025
20250616 Week Rotation Today Rotation Week 20250618



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W23S40
(280",-629")
E37-W73
(110)
14.1 2.0 6.3e21
2 W05N10
(88",139")
W03-W07
(4)
0.1 11.2 1.3e20
3 E71S04
(-891",-67")
E77-E66
(11)
0.1 -2.6 -7.1e19

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 17-Jun-2025 23:30 UT .