17 August 2012
⇐20120816 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120818⇒

NOAA
4 Active Regions
11542
11543
11546
11547

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W13S17
(210",-372") 		W05-W21
(16) 		1.9 3.0 1.6e33
2 W00N55
(1",703") 		E20-W18
(38) 		1.3 0.5 4.1e32
3 E30S40
(-363",-684") 		E39-E17
(22) 		1.2 1.2 1.3e33
4 W05N42
(57",543") 		W02-W07
(5) 		0.1 -1.8 -7.1e31
5 E12N44
(-140",582") 		E15-E09
(6) 		0.1 -1.0 -3.1e31
6 W02N26
(26",313") 		E01-W03
(4) 		0.1 -2.0 -2.9e31
7 W03S27
(41",-528") 		E01-W04
(5) 		0.1 5.9 1.1e32

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 17-Aug-2012 09:00 UT .