21 September 2012
⇐20120920 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120922⇒

NOAA
6 Active Regions
11569
11571
11573
11574
11575
11576

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W40N07
(612",30") 		W29-W54
(25) 		1.4 -1.8 -1.1e33
2 W36N64
(246",814") 		W13-W48
(35) 		0.5 -0.4 -2.8e32
3 W03N21
(40",223") 		E00-W05
(5) 		0.1 -21.6 -6.4e32
4 W05N67
(33",826") 		E03-W11
(14) 		0.1 -0.6 -6.7e31

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 21-Sep-2012 21:00 UT .