21 February 2019
⇐20190220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190222⇒

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 E41S21
(-598",-261") 		E68-E12
(56) 		4.7 -0.5 -1.2e21
2 E28S70
(-157",-867") 		E58-W88
(146) 		2.6 -1.2 -5.1e21
3 E27N59
(-228",879") 		69
(2.0e05) 		0.5 5.1 1.0e22
4 W18N68
(110",936") 		W06-W36
(30) 		0.2 1.3 1.2e21

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-Feb-2019 20:30 UT .