29 December 2012
⇐20121228 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20121230⇒

NOAA
4 Active Regions
11635
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 E21N50
(-219",778") 		E38-W05
(43) 		2.1 -0.1 -1.1e32
2 W51S47
(517",-698") 		W48-W67
(19) 		0.5 -1.9 -1.2e33
3 W19N53
(186",806") 		W08-W32
(24) 		0.4 0.4 1.7e32
4 W21S14
(342",-190") 		W18-W26
(8) 		0.2 6.6 4.0e32

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 29-Dec-2012 22:00 UT .