12 December 2017
⇐20171211 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171213⇒

NOAA
2 Active Regions
12691
12690

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 W27N58
(237",833") 		E70-W55
(125) 		5.7 0.6 4.9e33
2 E26N17
(-408",295") 		E49-E04
(45) 		4.2 1.4 1.8e33
3 W16S23
(250",-372") 		E15-W29
(44) 		4.1 -0.5 -6.2e32
4 E20S68
(-126",-900") 		E62-W50
(112) 		1.4 -0.8 -2.7e33

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 12-Dec-2017 20:30 UT .