18 January 2025
20250117 Week Rotation Today Rotation Week 20250119



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W34S24
(501",-334")
W13-W53
(40)
3.0 -8.2 -4.8e21
2 E42S63
(-298",-838")
E52-E43
(9)
0.4 0.4 6.0e19
3 W70S09
(906",-124")
W62-W78
(16)
0.1 -1.9 -8.3e19

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 18-Jan-2025 20:30 UT .