25 February 2012
⇐20120224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120226⇒

NOAA
4 Active Regions
11420
11422
11423
11424

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E16S61
(-132",-786") 		E43-W33
(76) 		5.3 0.8 3.6e33
2 W47S22
(664",-279") 		W36-W68
(32) 		1.0 5.2 3.2e33
3 W18N47
(211",779") 		E01-W31
(32) 		1.0 1.2 1.1e33
4 E35N13
(-549",310") 		E42-E28
(14) 		0.7 -10.4 -3.2e33

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 25-Feb-2012 22:00 UT .