31 December 2011
⇐20111230 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120101⇒

NOAA
5 Active Regions
11384
11386
11388
11389
11390

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W36S52
(352",-749") 		E67-W58
(125) 		9.2 1.0 9.1e33

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 31-Dec-2011 22:00 UT .