21 September 2017
⇐20170920 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170922⇒

NOAA
2 Active Regions
12680
12681

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E44N26
(-591",345") 		E57-E28
(29) 		4.2 1.1 2.5e33
2 W03S56
(29",-855") 		E42-W50
(92) 		2.5 -0.6 -2.3e33
3 W14S20
(211",-429") 		W04-W24
(20) 		2.1 -0.8 -5.2e32
4 W52N70
(264",864") 		E72-W82
(154) 		1.8 0.9 4.8e33
5 E57N57
(-436",762") 		E88-E69
(19) 		0.5 0.4 3.6e32
6 E48S06
(-704",-172") 		E54-E41
(13) 		0.2 1.7 2.6e32

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 21-Sep-2017 19:30 UT .