19 May 2025
⇐20250518 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250520⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E06S42
(-73",-612") 		E59-W60
(119) 		18.3 2.1 7.7e21
2 E33N29
(-448",486") 		E45-E23
(22) 		0.9 4.7 8.9e20
3 W21N16
(320",298") 		W17-W25
(8) 		0.2 3.1 1.1e20
4 E19N08
(-310",171") 		E21-E17
(4) 		0.2 5.6 1.7e20

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-May-2025 23:30 UT .