19 January 2025
20250118 Week Rotation Today Rotation Week 20250120



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W44S25
(615",-352")
W26-W64
(38)
2.0 -6.5 -2.9e21
2 E35S66
(-225",-864")
E45-E06
(39)
1.1 0.4 1.6e20
3 W61S15
(828",-204")
W55-W64
(9)
0.0 -4.7 -6.6e19

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 19-Jan-2025 20:30 UT .