21 March 2017
⇐20170320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170322⇒

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 W27S20
(412",-228") 		E01-W46
(47) 		11.0 1.2 3.9e33
2 W02N64
(15",909") 		E44-W54
(98) 		1.0 0.7 1.8e33
3 E56S10
(-784",-100") 		E67-E47
(20) 		0.8 -1.5 -1.0e33
4 E66S30
(-763",-432") 		E67-E57
(10) 		0.7 -1.0 -1.2e33

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 21-Mar-2017 20:30 UT .