22 September 2015
⇐20150921 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150923⇒

NOAA
4 Active Regions
12415
12418
12419
12420

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 E19S41
(-231",-708") 		59
(2.1e05) 		-2.8 6.2 1.3e34
2 E01N14
(-13",118") 		E16-W13
(29) 		2.6 -9.4 -4.3e33

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 22-Sep-2015 18:30 UT .