20 December 2017
⇐20171219 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171221⇒

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 E14N12
(-223",231") 		E20-W03
(23) 		1.3 -3.0 -8.8e32
2 E56S40
(-623",-611") 		E71-E42
(29) 		0.9 -0.8 -1.1e33
3 E29S06
(-475",-72") 		E37-E20
(17) 		0.8 -1.8 -4.5e32
4 E20N72
(-106",934") 		E42-W14
(56) 		0.4 1.4 2.5e33
5 W36S73
(166",-926") 		W26-W48
(22) 		0.3 -1.0 -1.3e33
6 W40S08
(621",-106") 		W37-W42
(5) 		0.2 -4.4 -3.8e32

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-Dec-2017 20:30 UT .