18 September 2015
⇐20150917 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150919⇒

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 W49N43
(526",591") 		W11-W78
(67) 		6.7 1.1 6.7e33
2 W27N09
(430",42") 		W15-W39
(24) 		1.4 1.4 5.4e32
3 E53N09
(-753",74") 		E59-E48
(11) 		0.5 -5.0 -1.8e33

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 18-Sep-2015 18:30 UT .