17 April 2012
⇐20120416 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120418⇒

NOAA
7 Active Regions
11455
11457
11458
11459
11460
11461
11462

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W11S21
(171",-267") 		W09-W13
(4) 		0.0 3.2 3.1e31

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 17-Apr-2012 23:00 UT .