20 September 2015
⇐20150919 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150921⇒

NOAA
3 Active Regions
12415
12418
12419

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 E27N13
(-429",114") 		E44-E15
(29) 		1.9 -7.4 -4.0e33
2 E37S33
(-486",-593") 		E51-E25
(26) 		1.3 -3.0 -3.1e33
3 W68N31
(759",451") 		W52-W86
(34) 		0.9 0.7 1.4e33
4 W58N64
(359",823") 		W51-W85
(34) 		0.3 0.8 7.3e32

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 20-Sep-2015 18:30 UT .