18 January 2013
⇐20130117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130119⇒

NOAA
4 Active Regions
11652
11654
11658
11659

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E67S48
(-594",-706") 		E71-E55
(16) 		0.3 -1.6 -1.4e33
2 E17N08
(-282",215") 		E19-E13
(6) 		0.2 -3.3 -1.8e32
3 E16S02
(-273",54") 		E18-E14
(4) 		0.2 -1.1 -5.0e31
4 E67S37
(-717",-558") 		E70-E62
(8) 		0.0 -1.0 -9.6e31

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 18-Jan-2013 22:00 UT .