4 September 2016
⇐20160903 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20160905⇒

NOAA
4 Active Regions
12581
12585
12586
12584

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 W17N52
(176",673") 		E66-W76
(142) 		19.0 0.8 9.0e33
2 W33S17
(498",-374") 		W00-W58
(58) 		4.5 1.9 3.8e33
3 W07S70
(43",-926") 		W00-W18
(18) 		0.1 -0.9 -3.7e32

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 4-Sep-2016 23:31 UT .