25 April 2012
⇐20120424 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120426⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E37N31
(-489",540") 		E60-E23
(37) 		1.0 2.1 1.4e33
2 E42S77
(-146",-912") 		E79-W12
(91) 		0.4 1.3 2.6e33

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 25-Apr-2012 23:00 UT .