20 April 2015
⇐20150419 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150421⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W28S19
(430",-234") 		W18-W39
(21) 		1.5 5.3 2.5e33
2 W36S78
(120",-915") 		E80-W84
(164) 		0.6 -0.2 -7.0e32

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 20-Apr-2015 23:35 UT .