21 October 2017
⇐20171020 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171022⇒

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 E05N49
(-53",672") 		E85-W87
(172) 		11.2 0.8 4.7e33
2 W29S68
(175",-919") 		E15-W54
(69) 		0.5 -0.9 -2.4e33
3 W56S18
(764",-338") 		W50-W63
(13) 		0.3 -0.7 -2.3e32

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 21-Oct-2017 23:30 UT .