31 May 2016
⇐20160530 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20160601⇒

NOAA
4 Active Regions
12548
12549
12550
12551

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 E31S04
(-483",-55") 		E43-E16
(27) 		1.9 -2.4 -1.5e33
2 E25N63
(-178",849") 		E61-W03
(64) 		1.0 0.7 1.4e33
3 W39S76
(148",-915") 		W25-W62
(37) 		0.1 -2.1 -1.1e33

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 31-May-2016 23:31 UT .