29 February 2012
⇐20120228 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120301⇒

NOAA
3 Active Regions
11423
11425
11426

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W42S64
(286",-825") 		E79-W60
(139) 		2.3 0.7 2.4e33
2 E13S23
(-198",-272") 		E22-W00
(22) 		1.4 -1.4 -4.7e32
3 W07N31
(102",600") 		W03-W10
(7) 		0.1 -10.1 -4.7e32
4 E48S14
(-703",-147") 		E50-E46
(4) 		0.1 -0.4 -1.7e31
5 E64S24
(-800",-337") 		E66-E62
(4) 		0.0 7.0 4.1e32
6 W17N17
(264",395") 		W14-W19
(5) 		0.0 -3.8 -4.4e31

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 29-Feb-2012 22:00 UT .