4 May 2025
⇐20250503 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250505⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E33S34
(-434",-495") 		E59-W08
(67) 		4.5 -4.3 -4.1e21
2 W23N53
(229",791") 		E21-W40
(61) 		1.2 -0.6 -2.4e20
3 W34N27
(473",472") 		W19-W40
(21) 		0.5 -1.4 -1.6e20
4 W15S53
(151",-724") 		E03-W26
(29) 		0.5 0.7 7.8e19
5 E19S14
(-304",-181") 		E22-E15
(7) 		0.2 -4.7 -1.4e20
6 W51N07
(738",151") 		W48-W54
(6) 		0.1 -9.1 -2.5e20
7 E09S44
(-103",-615") 		E12-E05
(7) 		0.1 -2.2 -4.2e19
8 E51N16
(-707",303") 		E54-E47
(7) 		0.1 1.8 2.5e19
9 W01S45
(17",-624") 		E01-W03
(4) 		0.0 -1.1 -1.0e19
10 W50N29
(641",497") 		W48-W54
(6) 		0.0 -2.8 -3.1e19
11 W54S07
(763",-82") 		W52-W56
(4) 		0.0 -1.6 -1.6e19

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 4-May-2025 23:30 UT .