20 April 2012
⇐20120419 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120421⇒

NOAA
7 Active Regions
11459
11460
11461
11462
11463
11464
11465

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E36N23
(-513",441") 		E41-E30
(11) 		0.3 -11.2 -1.9e33
2 E21N12
(-335",272") 		E24-E17
(7) 		0.2 -48.5 -3.1e33

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-2012 23:00 UT .