19 April 2012
⇐20120418 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120420⇒

NOAA
6 Active Regions
11459
11460
11461
11462
11463
11464

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E11N48
(-118",761") 		E18-W01
(19) 		0.5 2.8 1.2e33
2 E34N12
(-526",262") 		E38-E28
(10) 		0.3 -38.4 -4.1e33
3 E18S53
(-172",-716") 		E20-E15
(5) 		0.1 -2.7 -1.2e32
4 E50N23
(-675",426") 		E52-E47
(5) 		0.1 -10.4 -5.2e32
5 W02S19
(31",-226") 		E00-W03
(3) 		0.0 -2.3 -2.0e31

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 19-Apr-2012 23:00 UT .