9 May 2025
⇐20250508 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250510⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W38S36
(473",-523") 		W03-W71
(68) 		4.6 -2.8 -2.8e21
2 W06N31
(79",536") 		E05-W13
(18) 		0.8 4.7 6.6e20
3 E28S11
(-435",-134") 		E31-E23
(8) 		0.1 -4.4 -1.0e20
4 E41N34
(-514",571") 		E50-E34
(16) 		0.0 -0.8 -8.4e18

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 9-May-2025 23:30 UT .