27 February 2013
⇐20130226 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130228⇒

NOAA
4 Active Regions
11680
11681
11682
11683

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E14N10
(-239",279") 		E33-W15
(48) 		3.0 -2.0 -1.5e33
2 W49S55
(423",-739") 		W17-W76
(59) 		0.8 -2.1 -2.1e33
3 W21N23
(319",486") 		W16-W24
(8) 		0.4 -2.4 -3.4e32

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 27-Feb-2013 22:00 UT .