21 January 2017
⇐20170120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170122⇒

NOAA
4 Active Regions
12625
12626
12627
12628

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 W38S25
(542",-356") 		W12-W67
(55) 		2.8 1.5 1.9e33
2 E22N54
(-211",838") 		E37-E01
(36) 		1.8 0.3 7.8e32
3 E48S09
(-713",-101") 		E65-E31
(34) 		1.6 0.8 7.9e32

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-Jan-2017 20:30 UT .