17 February 2019
⇐20190216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190218⇒

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 W22S16
(348",-158") 		E05-W36
(41) 		4.5 0.6 6.7e20
2 W32S71
(171",-879") 		E71-W62
(133) 		2.2 -1.4 -6.2e21
3 W27N62
(208",898") 		E33-W59
(92) 		1.5 0.8 3.8e21
4 W20N27
(297",543") 		W18-W23
(5) 		0.1 2.4 5.1e19

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 17-Feb-2019 20:30 UT .