28 July 2025
⇐20250727 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250729⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W01N65
(9",812") 		E46-W49
(95) 		3.5 -0.6 -6.4e20
2 W24N37
(306",496") 		E07-W42
(49) 		3.2 -2.7 -1.7e21
3 W05N05
(80",-1") 		E03-W10
(13) 		0.9 -3.4 -4.7e20
4 E09S42
(-108",-695") 		E15-E02
(13) 		0.4 -1.5 -1.3e20
5 W06N49
(65",657") 		W02-W09
(7) 		0.1 3.0 3.3e19
6 E11N41
(-132",551") 		E12-E08
(4) 		0.1 -4.3 -4.3e19
7 E16N42
(-192",560") 		E18-E14
(4) 		0.0 -4.2 -3.5e19
8 E50N01
(-724",-48") 		E51-E48
(3) 		0.0 -1.0 -9.3e18

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 28-Jul-2025 11:30 UT .