21 November 2017
⇐20171120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171122⇒

NOAA
2 Active Regions
12687
12688

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 E00N66
(-1",872") 		132
(4.2e05) 		0.9 6.0 2.5e34
2 W37N30
(509",465") 		W30-W45
(15) 		0.5 0.5 1.3e32
3 E38N10
(-592",147") 		E43-E29
(14) 		0.5 -1.4 -2.5e32

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-Nov-2017 20:30 UT .