20 March 2017
⇐20170319 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170321⇒

NOAA
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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 W17S25
(248",-307") 		E16-W41
(57) 		14.0 1.2 4.3e33
2 W11N67
(74",926") 		E29-W38
(67) 		0.5 0.6 1.3e33
3 E02S82
(-4",-933") 		E80-W68
(148) 		0.4 -0.8 -1.5e33
4 E30N60
(-244",879") 		E54-E23
(31) 		0.4 0.5 5.3e32

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-Mar-2017 20:30 UT .