27 April 2019
⇐20190426 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190428⇒

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 E18S22
(-270",-298") 		E43-W20
(63) 		9.2 -0.4 -8.5e20
2 W28S04
(442",-4") 		W03-W43
(40) 		4.3 0.0 3.5e19
3 E17S67
(-106",-849") 		E82-W73
(155) 		3.2 -0.8 -3.9e21
4 W45N67
(259",898") 		W36-W61
(25) 		0.1 2.2 9.3e20

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 27-Apr-2019 22:00 UT .