2 May 2025
⇐20250501 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250503⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W01N44
(15",709") 		E31-W18
(49) 		2.2 -0.9 -4.3e20
2 E47S34
(-580",-487") 		E72-E19
(53) 		2.2 -4.2 -2.3e21
3 W24N03
(386",116") 		W18-W30
(12) 		1.3 -6.5 -1.4e21
4 W23N28
(323",501") 		W18-W28
(10) 		0.5 -8.8 -8.3e20
5 W44S18
(634",-251") 		W40-W49
(9) 		0.3 -10.9 -7.7e20
6 W04S57
(40",-765") 		E00-W07
(7) 		0.0 -0.5 -6.5e18
7 W51N26
(666",455") 		W49-W54
(5) 		0.0 -1.8 -2.1e19
8 E41N66
(-256",887") 		E50-E43
(7) 		0.0 -0.8 -1.9e19

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 2-May-2025 23:30 UT .