18 December 2017
⇐20171217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171219⇒

NOAA
1 Active Region
12691

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 W47N22
(657",385") 		W34-W56
(22) 		0.8 1.3 7.6e32
2 E36N12
(-563",223") 		E44-E25
(19) 		0.8 -3.2 -9.9e32
3 W04S74
(19",-930") 		E40-W58
(98) 		0.5 -0.5 -7.8e32
4 W10S08
(175",-117") 		W03-W16
(13) 		0.2 -1.9 -8.6e31
5 W16S04
(277",-37") 		W13-W19
(6) 		0.2 -1.0 -4.2e31
6 W52N67
(295",906") 		W43-W71
(28) 		0.1 1.5 6.6e32
7 E06S03
(-100",-31") 		E07-E05
(2) 		0.0 -3.9 -2.3e31

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-Dec-2017 20:30 UT .