29 September 2017
⇐20170928 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170930⇒

NOAA
3 Active Regions
12681
12682
12683

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 W21N64
(145",813") 		E73-W36
(109) 		4.4 0.9 4.3e33
2 E41S19
(-591",-385") 		E51-E34
(17) 		1.2 -0.7 -4.7e32
3 E18N04
(-300",-48") 		E21-E15
(6) 		0.2 -3.4 -1.4e32
4 W61N43
(618",607") 		W58-W65
(7) 		0.0 -2.0 -1.1e32

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 29-Sep-2017 23:30 UT .