1 May 2025
⇐20250430 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250502⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W05N37
(63",627") 		E29-W19
(48) 		3.2 -4.7 -3.1e21
2 E52S32
(-644",-462") 		E83-E34
(49) 		0.9 -3.9 -1.0e21
3 W30S19
(445",-250") 		W25-W34
(9) 		0.4 -12.5 -9.7e20
4 E17N29
(-237",522") 		E24-E05
(19) 		0.4 -1.0 -7.4e19
5 W47N16
(671",300") 		W44-W50
(6) 		0.2 -11.0 -5.7e20
6 W35N27
(489",486") 		W32-W38
(6) 		0.1 -6.3 -1.8e20
7 E37N58
(-298",837") 		E42-E32
(10) 		0.0 -0.7 -1.3e19

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 1-May-2025 23:30 UT .