21 December 2017
⇐20171220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171222⇒

NOAA
1 Active Region
12692

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 E32S35
(-423",-535") 		E54-E01
(53) 		4.0 -1.4 -2.8e33
2 W10N13
(160",250") 		E06-W20
(26) 		1.5 -3.4 -1.1e33
3 W14N71
(76",932") 		E28-W53
(81) 		0.5 1.1 2.1e33
4 E56S61
(-396",-841") 		E61-E62
(-1) 		0.1 -0.9 -2.9e32
5 E01N02
(-18",56") 		E03-W02
(5) 		0.1 -1.1 -1.7e31
6 W61S70
(289",-912") 		W62-W68
(6) 		0.0 -0.9 -2.8e32

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-Dec-2017 20:30 UT .