17 February 2025
⇐20250216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250218⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W21N43
(250",742") 		W07-W35
(28) 		0.8 1.9 3.8e20
2 W58S29
(721",-405") 		W47-W73
(26) 		0.7 -3.4 -6.8e20
3 E51S70
(-257",-881") 		E81-E25
(56) 		0.3 0.7 1.0e20

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 17-Feb-2025 20:30 UT .