4 February 2012
⇐20120203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120205⇒

NOAA
3 Active Regions
11410
11413
11414

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E41S30
(-547",-422") 		E48-E34
(14) 		0.9 5.9 2.9e33
2 W33S21
(493",-267") 		W27-W42
(15) 		0.8 -3.4 -9.7e32
3 W59N11
(820",241") 		W54-W64
(10) 		0.0 -2.3 -1.3e32

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 4-Feb-2012 22:00 UT .