28 April 2017
⇐20170427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170429⇒

NOAA
3 Active Regions
12651
12653
12652

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 E02S62
(-12",-805") 		E75-W49
(124) 		4.9 -1.0 -5.0e33
2 E06N57
(-55",840") 		E27-W26
(53) 		2.6 0.5 1.7e33
3 W16N17
(253",341") 		W12-W20
(8) 		0.2 7.0 3.5e32
4 W59S31
(695",-463") 		W51-W67
(16) 		0.2 -1.0 -2.3e32

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 28-Apr-2017 19:30 UT .