21 September 2015
⇐20150920 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150922⇒

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 E26S37
(-336",-654") 		E47-E07
(40) 		2.3 -2.9 -4.4e33
2 E16N14
(-263",124") 		E32-E01
(31) 		2.2 -8.2 -4.0e33
3 E42S14
(-625",-322") 		E43-E41
(2) 		0.0 6.6 1.4e32

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-Sep-2015 18:30 UT .