19 February 2012
⇐20120218 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120220⇒

NOAA
5 Active Regions
11418
11419
11420
11421
11422

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E41S34
(-532",-460") 		E59-E18
(41) 		2.8 4.0 6.2e33
2 W54S40
(598",-572") 		W43-W73
(30) 		0.6 -1.1 -6.7e32
3 E45N45
(-490",736") 		E66-E29
(37) 		0.4 1.1 7.9e32
4 W42S16
(622",-181") 		W36-W47
(11) 		0.3 -0.9 -1.4e32
5 E45S54
(-405",-729") 		E54-E40
(14) 		0.1 -0.6 -6.3e31

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 19-Feb-2012 22:00 UT .