28 February 2013
⇐20130227 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130301⇒

NOAA
4 Active Regions
11680
11681
11682
11683

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W18N11
(290",291") 		W03-W32
(29) 		2.5 -0.8 -5.6e32
2 E15N17
(-248",393") 		E23-E08
(15) 		0.9 -9.1 -2.5e33
3 E50S32
(-633",-441") 		E54-E47
(7) 		0.4 0.7 2.4e32
4 W35S57
(309",-749") 		W26-W42
(16) 		0.1 -2.3 -2.1e32

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 28-Feb-2013 22:00 UT .