20 December 2015
⇐20151219 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20151221⇒

NOAA
4 Active Regions
12468
12469
12470
12471

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 E29S54
(-276",-781") 		E75-W61
(136) 		5.0 -2.7 -1.4e34
2 E22S10
(-355",-139") 		E25-E18
(7) 		0.5 -1.8 -2.3e32
3 W02S32
(30",-495") 		E01-W04
(5) 		0.1 -10.8 -2.2e32

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 20-Dec-2015 18:35 UT .