21 January 2012
⇐20120120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120122⇒

NOAA
6 Active Regions
11401
11402
11405
11407
11408
11409

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E57S42
(-609",-619") 		E70-E37
(33) 		4.0 1.1 6.2e33
2 E43N44
(-478",724") 		E72-E25
(47) 		1.4 1.0 1.9e33
3 W12S08
(195",-54") 		W07-W16
(9) 		0.3 -1.0 -5.2e31
4 E23S34
(-312",-477") 		E25-E20
(5) 		0.1 -1.5 -3.5e31

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-Jan-2012 22:00 UT .