18 August 2017
⇐20170817 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170819⇒

NOAA
1 Active Region
12671

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 W27N49
(285",648") 		E87-W65
(152) 		11.4 1.5 1.0e34
2 W16S10
(262",-264") 		E05-W26
(31) 		2.5 -0.1 -3.9e31
3 E21S70
(-119",-919") 		E42-W02
(44) 		0.2 -1.0 -1.5e33

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-Aug-2017 23:30 UT .