28 December 2012
⇐20121227 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20121229⇒

NOAA
5 Active Regions
11635
11636
11637
11638
11639

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W18N52
(181",798") 		E07-W29
(36) 		1.2 0.6 7.1e32
2 W36S47
(388",-689") 		W20-W56
(36) 		1.1 -2.2 -2.0e33

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 28-Dec-2012 22:00 UT .