22 September 2012
⇐20120921 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120923⇒

NOAA
7 Active Regions
11569
11571
11573
11574
11575
11576
11577

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W55N08
(780",63") 		W44-W67
(23) 		0.8 -1.4 -9.4e32
2 W20N20
(302",226") 		W15-W27
(12) 		0.2 -13.7 -7.9e32

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 22-Sep-2012 21:00 UT .